Five shot outside Chicago school after basketball game

Five people were shot and another hurt when gunmen opened fire outside a Chicago school after a Friday night basketball game, police said.

"It does not appear to be that these [people injured] were students at the school and it appears it is possibly gang related," Chicago police officer Amina Greer told AFP.

Witnesses told police the gunmen drove up in a sports utility vehicle and fired into a crowd leaving a basketball game at Dunbar high school on the city's south side about 7.45pm.

"A girl started screaming and then we just started hearing shots," Robert McCallum told CBS2 news.

"I was the first to jump on the ground because they started shooting our way and everybody piled up on me. Man, it was crazy."

Police were combing the city's snow-bound streets for the shooters but made no immediate arrests.