Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Problem:Biggest search and rescue in nation’s history, involving 725 volunteers, ends with Birna Brjansdottir, 20, found dead on a beach and two sailors detained 
  
 Iceland was in shock after a young woman missing for eight days was found dead on a beach, sparking a rare murder case that has gripped the nation. 
  
  
  
 Police said in a statement on Sunday they were treating the case as murder although “currently it is not possible to determine the cause of death”. 
  
 Iceland's Pirate party invited to form government Read more 
  
 Iceland has one of the world’s lowest crime rates. Homicides are extremely rare and police patrol the streets unarmed. 
  
 Birna Brjansdottir, 20, was found dead on a beach south of Reykjavik after more than 725 volunteers took part in the biggest search and rescue operation in Icelandic history, according to media. 
  
 Two Greenlandic sailors aged 25 and 30 were being held in connection with her disappearance, which happened on 14 January after a night of drinking in Reykjavik’s bars. 
  
 Surveillance footage around 5am showed her making her way through snowy and foggy streets by herself and buying a kebab. 
  
 Her shoes were found in the port of Hafnarfjordur, south of Reykjavik, not far from the dock where a Greenlandic trawler, the Polar Nanoq, was moored. 
  
 Video surveillance cameras also showed a small red car, a Kia Rio, parked near the vessel around 6.30am – identical to a vehicle observed near the spot where Brjansdottir was last seen. 
  
 The Polar Nanoq lifted anchor a few hours after Brjansdottir went missing but members of Iceland’s elite police force, known as the Viking Squad, flew out to the ship by helicopter to question the crew. 
  
 The ship returned to Reykjavik and two sailors were taken into custody. 
  
 Traces of Brjansdottir’s blood were later found in the red car, which had been rented by the sailors, authorities said. 
  
 A country of 330,000 people, Iceland has registered an average of 1.8 murders per year since 2001, according to police statistics, with the killers often under the influence of alcohol or having mental health issues. 
  
 Agence France-Presse ||||| Crime 
  
 Body of missing girl found: All evidence points to murder by two Greenlandic fishermen 
  
 By Staff 
  
 The scene of the crime Birna went missing in downtown Reykjavík early Saturday Jan 14. Her body was found today, Sunday, near Selvogsviti lighthouse on Reykjanes peninsula. Police believes she was murdered by two crewmembers of a Greenlandic trawler harboured in Hafnarfjarðarhöfn harbour. Photo/Loftmyndir-Vísir-Iceland Magazine. 
  
 Today Police and members of the Search and Rescue units found the body of 20 year old local girl, Birna Brjánsdóttir. Birna went missing early in the morning of Saturday January 14. Police has arrested two crew members of a Greenlandic trawler, Polar Nanoq, who are believed to have murdered Birna and then dumped her body in the sea. Her body was recovered from the beach near Selvogsviti lighthouse on the south coast of Reykjanes peninsula. Police made the announcement at a press conference earlier today. 
  
 The local news site Vísir reports that Police has found blood which has been confirmed to have come from Birna in a red Kia Rio which had been rented by sailors from the Greenlandic trawler Polar Nanoq. Birna's shoes had previously been found close to where the ship was harboured. On Wednesday Icelandic Police boarded the trawler at sea and arrested the two men at sea. Police has now confirmed that they believe they have overwhelming evidence proving the two men murdered Birna. 
  
 A third man was later arrested, but released after questioning. A fourth man is still in custody after Police discovered large quantities of drugs on-board the ship. Vísir reports that the street value of the drugs 1 million USD. 
  
 On Saturday the Icelandic Search and Rescue Units mounted the largest search in Icelandic history to try to find Birna. More than 500 ICE-SAR members participated in the search, in addition to the Icelandic Coast Guard, and members of the Police. Her body was found earlier today in the beach near Selvogsviti lighthouse on the south coast of Reykjanes peninsula. 
  
 Previous Iceland Magazine coverage of the case: 
  
 Monday: 
  
 A large scale search had been underway since Saturday for 20 year old local woman. Police feared foul play. 
  
 Read more: Young local woman missing since Saturday: Have you seen her? 
  
 Tuesday 
  
 Police relased CCTV footage of Birna walking in downtown Reykjavík on Monday. 
  
 Read more: Search for missing young woman: Police releases footage from surveillance cameras 
  
 Shoes which match those worn by Birna were found early Tuesday morning in Hafnafjörður, south of Reykjavík. Police does not rule out the shoes were planted at the scene. All available Police and Search and Rescue members are searching in and around Hafnafjörður harbour. 
  
 Read more: Police does not rule out that pair of shoes believed to belong to missing woman were planted 
  
 Tuesday afternoon Police found what it believes is the red Kia Rio seen in security camera footage just seconds before she was last spotted on CCTV footage in down town Reykjavík. The car was likely driven by foreign nationals. The driver is seen behaving suspiciously shortly after Birna's cellphone is turned off at 5:50 AM. 
  
 Read more: Missing woman: Car seen in surveillance tapes likely found, driver seen behaving strangely 
  
 The car was linked to crew members of Greenlandic trawler which had been docked in Hafnarfjörður from Wednesday to Satuday. the trawler had sailed out and was fishing off the east coast of Greenland. 
  
 Read more: DEVELOPING: Car linked to disappearance of young local woman connected crew of a trawler from Greenland 
  
 Wednesday: 
  
 Security camera footage from Hafnarfjörður harbour shows crew members exiting the red Kia Rio, behaving suspiciously. The trawler was returned to harbour in Reykjavík. 
  
 Read more: Missing girl: Disturbing clues, no arrests, but Greenlandic trawler returned to harbour in Iceland 
  
 The case has gripped the Icelandic nation. Police warns people to avoid of "hysteria". 
  
 Read more: Airing of British TV series The Missing postponed while search continues for missing girl 
  
 Police officers and members of the Police Special Forces were flown out to the Danish Coast Guard vessel HDMS Triton which was on intercept course with the Polar Nanoq. 
  
 Read more: Missing girl: Members of the Police Special Forces on their way to Greenlandic trawler 
  
 Police arrested two men on board the trawler. 
  
 Read more: Two arrested on-board Greenlandic trawler in connection to missing girl 
  
 Thursday 
  
 More arrests on-board the ship, which arrived in harbour at 23:07 on Wednesday 
  
 Read more: Video: Third sailor on Greenlandic trawler arrested and taken for questioning over missing girl 
  
 Police reveals that evidence from the a red Kia Rio the sailors had rented from Friday to Saturday pointed to a violent crime. 
  
 Read more: Missing girl: Evidence from car rented by crew members of Greenlandic trawler points to a crime 
  
 Police discover large quantities of drugs on-board the trawler, arresting a fourth man. 
  
 Read more: Fourth man arrested after large quantities of drugs discovered on board Greenlandic trawler 
  
 Friday: 
  
 Read more: Two sailors from Greenlandic trawler suspected of murder, search for missing girl continues 
  
 Read more: Greenlandic Foreign Minister postpones visit to Norway due to disappearance of local girl ||||| By MarEx 2017-01-22 19:25:34 
  
 Two crew members from the Greenlandic trawler Polar Nanoq were arrested off Iceland on January 19. 
  
 Icelandic special forces were flown out to the trawler by helicopter to make the arrests. The men have been charged with killing a 20-year-old Icelandic woman, Birna Bjránsdóttir. 
  
 They have pleaded not guilty, but police believe they have evidence to warrant their arrest. Her blood was found in a car rented by the two suspects, and the woman’s mobile phone rang shortly before she disappeared from a pier where the trawler was moored. One of her shoes was also found in the area. 
  
 Her body has now found on the beach near Selvogsviti lighthouse, south of Reykjavik. Over 700 volunteers from the Icelandic Search and Rescue Squad participated in the search for her body last week. She had been missing since early Saturday morning, January 14. 
  
 The cause of death is yet to be determined. 
  
 A third man was arrested, but released after questioning. A fourth man remains in custody after the police discovered large quantities of drugs onboard the trawler. |||||
Solution:
The largest search and rescue operation in Iceland's history met a grim end Sunday with the discovery of a 20-year-old's body on a beach on the south coast. Birna Brjansdottir had been missing for 8 days, and the AFP notes the country reported on little else during that time. Officials are treating it as murder, and a murder most rare: Iceland has averaged just 1.8 murders per year (among a population of 330,000) since 2001. Brjansdottir was last seen early on Jan. 14, after a night of bar-hopping in Reykjavik. Surveillance footage showed her buying a kebab around 5am, and two sailors from Greenland, ages 25 and 30, were on Wednesday arrested. Police believe she was murdered by the sailors and tossed into the water, reports Iceland Magazine, which flags two pieces of evidence. Brjansdottir's shoes were found in the port of Hafnarfjordur near where the Greenlandic trawler Polar Nanoq had been moored at the time she disappeared. Traces of her blood were found in a Kia Rio rented by the two sailors from the ship and parked near the dock. The car matched one spotted on surveillance footage near the last known sighting of Brjansdottir, per AFP. Members of the elite Viking Squad intercepted the trawler at sea and interrogated the crew. The ship returned to Reykjavik and the men were arrested. A third man was released and a fourth remains in custody after cops found a cache of drugs aboard, per Maritime Executive. Some 725 people participated in the search for Brjansdottir, whose cause of death has not been determined. (In other crime news, the "single worst case" of child murder in Miami remains in flux.)