Metro

Bus passengers beat up man who attacked elderly couple

A vicious bus rider got a dose of street justice when passengers gave him a beatdown after he attacked an elderly couple on an MTA bus with a profanity-laced rant, new video shows.

The creep approaches the elderly couple, and begins a vicious tirade at the female passenger on Saturday.

Her beau then uses his cane to get up and defend her honor — and the man attacks him.

Disgusted passengers then stepped in, knocking the man down and pummeling him. He was eventually thrown off the bus.

An MTA spokesman said it is under investigation.