NEW YORK -- Police say a man is dead and three other people are wounded following a shootout overnight in the Bronx. 

It happened around 11 p.m. on Olinville Avenue in Williamsbridge. 

Police said 21-year-old Jesse Bynum died after being shot in the head. 

So far, no arrests have been reported. 

This was one of four shootings since 9 p.m. Tuesday in the Bronx and Brooklyn that left a total of two dead and five wounded. 

Also in the Bronx, a 23-year-old woman, possibly an innocent bystander, was shot in the head and killed. Police say she was sitting in a parked car in the Concourse section when she was struck Tuesday night.

Anyone with any information about the shootings is asked to call the NYPD's Crime Stoppers hotline at 1-800-577-TIPS (8477), or for Spanish, 1-888-57-PISTA (74782). You can also submit a tip via their website or via DM on Twitter, @NYPDTips. All calls are kept confidential.