EAST NORTHPORT - Police are investigating a robbery of a Chase Bank that happened on Thursday in East Northport.  

According to police, a masked man walked into the Chase Bank at the Huntington Square Mall around 2:30 p.m. 

Police say the suspect announced a robbery, grabbed cash and got away.

About 15 minutes later, an officer responding got into a three-car crash at Vets Highway and Harned Road in Commack. 

The officer wasn't hurt.

A woman involved in the crash suffered non-life threatening injuries.