In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.

Police arrested a 22-year-old man early Saturday morning in connection with the Friday afternoon shooting that injured four people outside Rosemary Anderson High School. 
  
 Gang enforcement Det. Brian Sims made the arrest of 22-year-old Lonzo Deshawn Murphy. Murphy was booked into the downtown Portland jail at 6:27 am Saturday. 
  
 Murphy is being held without bail on a parole violation for a 2013 robbery conviction. 
  
 The 22-year-old was arrested in a car at North Interstate Avenue and Going Street at 1:30 a.m. A handgun was seized during the arrest. 
  
 Police spokesman Sgt. Pete Simpson said members of the bureau's special emergency response team served a search warrant at 1:30 a.m. at an apartment in the 200 block of North Killingsworth Street as part of the investigation. The apartment is just 5 blocks east of where the shooting took place just after noon Friday at the alternative high school. 
  
 According to court records, Murphy pleaded no contest to one count of second-degree robbery and one count of third-degree assault in June 2013. 
  
 Murphy was also convicted of interfering with public transportation and theft of services on Nov. 29, 2012, according to court records. He was sentenced to bench probation and ordered to complete an anger-management course. 
  
 Records show that Murphy also violated his probation in June 2013. 
  
 Police are asking anyone with information about the shooting to contact Det. Brad Clifton at 503-823-2087, or via email, brad.clifton@portlandoregon.gov; or Det. Todd Gradwahl at 503-823-2056, or via email todd.gradwahl@portlandoregon.gov. 
  
 -- Stuart Tomlinson ||||| This photo provided by Multnomah County Sheriff’s Office shows Lonzo Murphy. Portland police have arrested Murphy in connection with a shooting outside an alternative high school. Police said Saturday,... (Associated Press) 
  
 Portland Mayor Charlie Hales arrives near Rosemary Anderson High School, where a shooting took place Friday, Dec. 12, 2014. A shooter wounded two boys and a girl outside the high school Friday in what... (Associated Press) 
  
 Two unidentified students discuss the shooting as they wait outside Rosemary Anderson High School in Portland, Ore., Friday Dec., 12, 2014. A shooter wounded two boys and a girl outside the U.S. high... (Associated Press) 
  
 Parents and teachers gather outside Rosemary Anderson High School following a shooting at the alternative school, in Portland, Ore., Friday Dec., 12, 2014. A shooter wounded two boys and a girl outside... (Associated Press) 
  
 A group of students leave Rosemary Anderson High School in Portland, Ore., Friday Dec., 12, 2014. A shooter wounded two boys and a girl outside the U.S. high school Friday in what is believed to be a... (Associated Press) 
  
 Officials speak to people at the scene of a shooting at Rosemary Anderson High School in North Portland Friday, Dec. 12, 2014. A shooter wounded two boys and a girl outside the high school Friday in... (Associated Press) 
  
 Ralena Gaska, left, and her mother Deinda Gaska leave Rosemary Anderson High School in Portland, Ore., Friday Dec., 12, 2014. A shooter wounded two boys and a girl outside the U.S. high school Friday... (Associated Press) 
  
 A group gathers at the entrance of Rosemary Anderson High School following a shooting at the alternative school, in Portland, Ore., Friday Dec., 12, 2014. A shooter wounded two boys and a girl outside... (Associated Press) 
  
 A student is evacuated by police from Rosemary Anderson High School in Portland, Ore., Friday Dec., 12, 2014. A shooter wounded two boys and a girl outside the U.S. high school Friday in what is believed... (Associated Press) 
  
 Police guide students from Rosemary Anderson High School following a shooting at the school, in Portland, Ore., Friday Dec., 12, 2014. A shooter wounded two boys and a girl outside the U.S. high school... (Associated Press) 
  
 Family members greet their children who were escorted out of Rosemary Anderson High School in North Portland after a shooting on Dec. 12, 2014. A shooter wounded two boys and a girl outside a U.S. high... (Associated Press) |||||
A "person of interest" arrested after a school shooting yesterday in Portland, Oregon, has ties to gangs, police say. Authorities haven't said whether Lonzo Murphy, 22, was the gunman in the attack, which left three hospitalized, the AP reports. Two of those hurt are also linked to gangs, police note. Officials are still seeking two other people in the Rosemary Anderson High School shooting, they say. Murphy has been detained without bail after violating parole following a robbery conviction, the Oregonian reports.