Metro officials say the man responsible for shooting two people on a bus Monday night may have shed his clothes while fleeing from the scene.

The shooting was reported aboard an X-2 bus New Jersey Avenue and H Street NW around 10:30 p.m.

According to Dan Stessel with WMATA, three men boarded the bus at Gallery Place, and rode about seven blocks before getting into a verbal altercation.

One of the three pulled out a gun and shot the other two, a 17-year-old and a 21-year-old, hitting one in the hand and the other in the thigh. Both have been hospitalized, but are expected to be OK.

There were about 40 or 45 people on the bus at the time of the shooting, Stessel said.

Police are also looking for a female person of interest who was believed to be traveling with the shooter. She walked away from the scene.

Stessel said it appears as though the shooter shed his hat and jacket while fleeing the scene, so the lookout remains for a black man with a slim build, 5-feet-10-inches tall.

Stay with NBCWashington.com and News4 as this story develops.