Police are looking for a man involved in the stabbing of a teenager on a Metro bus on the George Washington University campus Wednesday afternoon.

Metro spokesman Dan Stessel said that around 12:20 p.m. an adult male and a teenager got into an altercation on an eastbound Route 80 Metrobus at 21st and F streets NW, which ended with the man stabbing the teen in the mid-section. The man then fled the bus, Stessel said.

The victim, described as 17 or 18 years old, was taken to a hospital with non-life-threatening injuries and later released, Stessel said. He said the teen is not believed to be a GWU student.

Metro officials believe the two individuals knew each other. The assailant is described as a bald, dark-complexioned black man in his early to mid-40s, 5 foot 3 inches tall, wearing a purple shirt with horizontal white stripes.

More from The Washington Post:

Police seek suspect in attempted D.C. sexual assault

Assault charge for Md. man after alleged slingshot attack on speed camera van