Transit Police report they are looking for "several juvenile males" they say taunted a woman of Asian descent - then went after other passengers who tried to intervene, before they smashed a train window and fled at JFK/UMass around 11 p.m. on Thursday.
Transit Police confirmed that this Instagram video appears to show part of what happened on the train before it pulled into the station.
The incident came two weeks after, police say, a man spit on and hurled racial insults at another woman of Asian descent at Broadway station.
In February, a pair of men screamed epithets and threw a Gatorade bottle at an Asia-American woman at Davis station.
Transit Police report they are looking for "several juvenile males," for the JFK/UMass incident, who started insulting the one woman, then began harassing and threatening other riders who tried to get them to leave her alone. They fled at JFK/UMass - after smashing out a train window.
When caught, "charges will be sought," police say.