PHILADELPHIA (CBS) — Two suspects are in police custody and a third is being sought in connection with the home invasion robbery of several Temple University students earlier this week.

Philadelphia police confirmed that shortly after releasing surveillance images of the suspects, two were taken into custody. A third suspect remains on the loose. The two suspects are expected to be officially charged Wednesday, while the third will be charged once he is captured.

Police say the ordeal happened sometime after 7 p.m. Monday night when a student was walking to her apartment off campus in the 1800 block of North 18th Street. (See Related Story)

As she pulled out her key and opened the door, police say a man wearing a red-hooded sweatshirt came up to her, and forced her into the building at gunpoint.

WATCH: Surveillance Images Of Suspects (Courtesy Of Philadelphia Police Department)

He then allowed two other accomplices into the home, and rounded up the woman’s three other roommates who were inside; all are Temple students.

“The three perpetrators then tied up all four females with duct tape, their wrists, their ankles, as well as their mouths,” said Chief Inspector Scott Small.

The three men rifled through their belongings, taking their cell phones, iPads, $400 in cash, credit cards, and other personal property according to police.

The suspects then took off.

Anyone with information on the third suspect is urged to call Philadelphia police.