Transit police are searching for a man who allegedly spat on an MBTA bus driver inside the vehicle while it was parked at the intersection of Washington and Harvard Streets in Charlestown.
Surveillance video shows a black male wearing a dark shirt and a blue baseball cap, making a "spitting" face at the driver, who is out of frame. Police said they suspect he is in his late teens or early twenties.
He allegedly fled the scene after the incident, which happened around 2:30 p.m. on Oct. 4.
If caught, the suspect will likely be charged with assault and battery, according to transit police.