Police say they are searching for five shooters who ambushed a group of teens outside a Philadelphia high school killing one 14-year-old and wounding four other teenagers after a football scrimmage. Nicholas Elizalde, of suburban Havertown, was killed in the ambush as he and the other teens walked away from an athletic field at Roxborough High School shortly after 4:30 p.m. Tuesday, authorities said. Philadelphia Police Captain Jason Smith said during a news conference Wednesday that police believe Elizalde was not the intended target of the shooters. Smith said the shooters sat in a parked SUV for about six minutes waiting for the teens to round the corner behind the school. When they did, five shooters — who Smith said also appeared to be juveniles — got out of the car and began firing. One person remained in the car, Smith said. One of the shooters chased a 17-year-old victim down the street, striking him in the leg and arm, Smith said. The shooter then stood over the teen and tried to empty his gun, but Smith said he had either run out of bullets or the gun had jammed. Smith said police were looking into several possible motives, including a fight that occurred in the lunchroom earlier in the day Tuesday. Smith said the 17-year-old, who police say was one of two teens they believe to have been the shooters' targets, does not attend Roxborough High and is not on the football team with the other victims. Police had earlier said all the victims were members of the football team. Police previously said they were examining social media and other sources to see whether the violence might have stemmed from events earlier in the day.