Police in Chicago say seven people were wounded in an early morning drive-by shooting outside a club on the city's West Side.

Police say they don't know what the motive was in the shooting early Sunday and no one is in custody.

Police spokesman Dan O'Brien says three people are hospitalized in critical condition and four are listed in good condition.

Officers say the seven victims were leaving a social club when someone in a passing van opened fire around 4:45 a.m.

Investigators were seeking to determine if any surveillance camera footage is available from the club.

Police did not how many people were in the van.