CHICAGO — A 21-year-old man was shot during an argument in Portage Park on Sunday morning, police said.

At 8 a.m., the man was sitting in a car in the 4000 block of North Central Avenue when he got into an argument with someone and the other person took out a gun and fired one shot, police said.

The bullet grazed the man's buttocks and he was treated at the scene, police said. He was in good condition.

A 22-year-old man was in custody in the shooting, police said.