Houston Rockets guard Kevin Porter Jr. was arrested in New York City on Monday for allegedly assaulting his girlfriend, former WNBA player Kysre Gondrezick, police sources told ABC News.

Porter, 23, is in custody at the NYPD’s 17th Precinct in Midtown.

Porter returned early Monday morning from an evening out to the Millennium Hotel in Times Square, where he and Gondrezick were staying. Gondrezick was upset with the late hour of his return and locked the door, according to police sources. Once he entered with the help of hotel security, Porter beat up the woman, the sources said.

The extent of Gondrezick’s injuries was not immediately clear.

Domestic assault charges are pending against Porter.

This is a developing story. Please check back for updates.