A man was stabbed on a Ride On bus Wednesday afternoon at the Shady Grove station in Rockville, Montgomery County police said.

The victim sustained non-life threatening injuries during the attack on the bus about 5:40 p.m., said Officer Janelle Smith, a county police spokeswoman.

A suspect in the assault was arrested at the scene. Officials said they do not know what led to the stabbing.

Clarence Williams is the night police reporter for The Washington Post and has spent the better part of 13 years standing next to crime scene tape, riding in police cars or waking officials in the middle of night to gather information about breaking news in and around Washington.