Police released photos of the man they allege is responsible for an assault just before 2 a.m. on Nov. 5 in the area of 279 Tremont St. in the Theater District, police said.
Witnesses said the suspect punched a man in the face and knocked him to the ground, where he hit his head, police said. The suspect left the area in a private chartered bus before officers arrived.
Investigators have identified the bus and several other passengers, but police haven't been able to determine the suspect's identity.
They ask anyone with information to contact detectives at 617-343-4571. Anonymous tips can be made by calling CrimeStoppers Tip Line at 1-800-494-TIPS or texting the word 'TIP' to 27463.
Click here to follow Daily Voice Cambridge and receive free news updates.