University of Colorado police announced Thursday evening that they had arrested the suspect in a sexual assault at Norlin Library earlier in the day.

CU police said on Twitter that Lamin Njie, 23, was arrested shortly after 5 p.m. after university staff called police when they spotted the man. Police did not say where Njie was located.

Njie is accused of sexually assaulting a woman working at the library shortly after noon on Thursday on the third level of the library and then running away, a news release said.

Njie and the victim met within the past week and exchanged contact information. The victim didn’t expect Njie to stop by the library.

Njie is described as a transient with a criminal history including identity theft, trespassing, forgery and resisting arrest.

Elizabeth Hernandez: 303-473-1106, hernandeze@dailycamera.com, twitter.com/ehernandez