A man “well-known” to police for causing disturbances with his pet rat on public transit was arrested for using the rodent to threaten people.

Jeffrey Stewart, 57, of Boston was taken into custody at Oak Grove station on Thursday “for threatening folks with his rat,” MBTA Transit Police said.

“He also was consuming alcohol, being disorderly (and) refused to leave,” Transit Police said on Twitter.

The rat, Jerry, was turned over to animal control, Transit Police said.

Stewart, who is facing disorderly conduct, trespassing and threats charges for Thursday’s incident in Malden, is known for scaring people with his rat, according to a December social media post from Transit Police.

On Dec. 1, 2022, a Transit Police officer responded to a report of a disturbance on an MBTA bus and found Stewart sitting with a rat on his shoulder.

“Other riders felt unsafe and exited,” Transit Police said at the time.

The officer explained the T’s policy regarding animals on public transit, and escorted Stewart and his rat off the bus, the post said.