D.C. police say a man has been arrested in two attacks on women, including a sexual assault at a Howard University residence hall.

Police said Saturday that Demarco Myles, 19, of the District has been arrested in the attacks.

In the most recent attack, police say a man entered a Howard University dorm room Friday afternoon, displayed a knife and sexually assaulted a woman.

A week earlier, on Oct. 26., police say a man knocked on an apartment door in Northeast Washington. When a woman answered the door, the man forced his way in and attempted to sexually assault her. The woman fought back and was stabbed several times before the man fled.

Myles is charged with assault and first-degree sexual assault.