Ten people were shot and one of them died when someone opened fire at a block party on a basketball court in Detroit.

Police were not releasing the identity of the person killed in the shooting on Saturday night.

The Detroit Free Press (http://on.freep.com/1QJMyx8 ) said one other person was in critical condition.

Detroit Asst. Police Chief Steve Dolunt said authorities do not know the reason for the shooting.

No other information was immediately released.