17 people is a lot (although they might have been hurt in the panic rather than shot) and since it happened in the aftermath of an NBA playoff game where the crowd was likely mostly White there almost certainly were at least a few Whites caught in the crossfire. According to Fox News the cops have ten people in custody. I look forward to seeing their mugshots. With 17 people shot and based on this from the Milwaukee Journal-Sentinel:
All the victims are expected to survive, according to Milwaukee police.
You can bet the shooters fit the usual profile.