COLLEGE PARK, Md. (WUSA) -- The University of Maryland Police is investigating an assault that took place on a shuttle bus. 

According to the Criminal Investigations Unit, the suspect pictured above punched a female passenger in the face without provocation on Saturday at about 1 a.m. 

If you have any information about the suspect call the University of Maryland Police at 301-405-3555 or email investigations@umpd.umd.edu or anonymously at www.umpd.umd.edu.