(CNN)  -- Tamil Tiger rebels acknowledged the death of their leader Sunday, nearly a week after the Sri Lankan government said it had recovered the body of Velupillai Prabhakaran and declared victory in the country's 25-year civil war with the rebels.



In this picture taken 27 November 2003, Velupillai Prabhakaran stands next to an LTTE flag.



Prabhakaran "attained martyrdom fighting the military oppression of the Sri Lankan state" on May 17, according to Tamilnet.com, a rebel Web site, citing the group's international affairs spokesman.



On Tuesday, President Mahinda Rajapaksa declared victory against the Tamil Tigers.



"We are celebrating the defeat of terrorism," he said in a nationally televised speech before parliament. "We have won and restored democracy in the country."



The president declared a national holiday for the following day to celebrate the war's end and begin a new phase in the country's history.   Watch the victory parade »



A short time after the presidential address, the military announced that it had recovered the body of Prabhakaran, leader and founder of the Tamil Tigers.



The rebels initially denied the death of their leader, claiming on Tamilnet.com that Prabhakaran was "alive and safe."



The defense ministry said the bodies of Prabhakaran and 18 other senior rebel leaders were among corpses found in mop-up operations, after government troops routed the Tigers -- formally known as the Liberation Tigers of Tamil Eelam.



The leaders included Prabhakaran's eldest son, Charles Anthony, as well as Pottu Amman, the Tigers' intelligence leader, according to the ministry.  Watch the U.N. chief discuss the humanitarian crisis »



Prabhakaran founded the Tamil Tigers, who have been declared a terrorist organization by 32 countries. It initiated the use of women in suicide attacks and, according to the FBI, invented the explosive suicide belt.



Prabhakaran is accused of masterminding the killing of former Indian Prime Minister Rajiv Gandhi in 1991 in the Tamil-dominated Indian state of Tami Nadu. Sri Lankan authorities allege that Prabhakaran was avenging Gandhi's decision to send Indian peacekeepers to Sri Lanka.



Two years later, a Tigers suicide bomber, allegedly acting on Prabhakaran's orders, detonated explosives that killed Sri Lanka's then-president, Ranasinghe Premadasa, during a rally.



The rebels have fought for an independent state for minority Tamils in Sri Lanka since July 1983. An estimated 70,000 to 80,000 people have died during the quarter century of fighting.
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question: how many people have died during the quarter century of fighting?, answer: An estimated 70,000 to 80,000 | question: What is the name of the rebel group?, answer: Tamil Tiger | question: Who declared victory?, answer: Sri Lankan government | question: how many have died, answer: An estimated 70,000 to 80,000 | question: what did the rebels acknowledge, answer: the death of their leader | question: Which leader died?, answer: Velupillai Prabhakaran | question: Who said they recovered his body?, answer: Sri Lankan government | question: Who was their leader who died?, answer: Velupillai Prabhakaran | question: what did the government declare, answer: victory in the country's 25-year civil war with the rebels. | question: How many people have died during the quarter century of fighting?, answer: 70,000 to 80,000 | question: Who was the leader of the Tamil Tigers?, answer: Velupillai Prabhakaran | question: Estimated amount of people that have died in coflict?, answer: 70,000 to 80,000 | question: Which government declared victory?, answer: Sri Lankan | question: What is the name of the Tamil Tiger leader?, answer: Velupillai Prabhakaran | question: The government of which country declared victory over the rebels?, answer: Sri Lankan