A 16-year-old boy was arrested late Friday in the fatal shooting that afternoon of another 16-year-old in a south Minneapolis alley, police said Saturday.

The victim, identified by family members as Trequan Sykes, was shot after an argument with other teens about 3:30 p.m. behind an apartment building in the 2900 block of Bloomington Avenue S., according to Minneapolis police spokesman Sgt. William Palmer.

The victim was able to run around the small building and get through the front door, where police found him. He was taken to Hennepin County Medical Center, where he died.

A suspect was arrested Friday night near Bloomington Avenue S. and E. 28th Street, Palmer said. He has not yet been charged.

Sykes, who lived with his godmother in the apartment building behind which he was shot, was a sophomore at Roosevelt High School.

On Saturday, a moment of silence was observed for Sykes at Roosevelt's graduation ceremony.

"These are young people," said Stan Alleyne, a spokesman for the Minneapolis school district. "These are people who are just starting to live, so anytime you have a situation like this, it's just tragic."