SLIPPERY ROCK TWP — A pair of masked intruders forced their way into a Slippery Rock University student’s apartment and robbed him at gunpoint Sunday night, state police said.

The 20-year-old student was not hurt but the robbers made off with about $150 in currency and a watch.

Trooper Gesuele Burello, the investigating officer, said the victim was alone in the apartment about 7:30 p.m. when he heard a knock on the door.

When he opened the door, the student was met by a man and woman — both black — wearing black hooded sweatshirts and panty hose pulled over their faces.

The unknown suspects burst into the apartment. The masked man produced a pistol and pointed it at the student,

The man held the student against the wall and threatened to kill him while the masked woman rifled through the victim’s belongings, Burello said. The robbers fled a short time later.

Police said no one in the 200-unit apartment complex off Kiester Road apparently heard or saw anything suspicious. There is also no surveillance video.

Burello said there are no suspects in the case but he has spoken to a “person of interest,” who he identified only as a woman.