Prince George Mounties have arrested six suspects in connection with what they describe as a “horrific sexual assault” that left one boy in hospital earlier this week.

Officers received an anonymous tip Monday directing them to a local apartment building, where they found the victim lying unconscious in a snow bank.

He was taken to the University Hospital of Northern B.C. for treatment, where he remained in serious but stable condition Thursday night.

“This is a very disturbing investigation,” Cpl. Craig Douglass said in a statement. “We will do everything we can to bring those responsible to justice.”

Mounties believe the boy, whose age has not been released, was lured to the apartment before being beaten and sexually assaulted by a group consisting of both youths and young adults.

A second boy is believed to have been lured to the same apartment, but suffered a less-severe attack.

Investigators eventually identified six suspects, all of whom have been arrested and remain in custody. They include a 20-year-old woman, an 18-year-old man and one girl and three boys whose ages have not been released.

None of the suspects have been charged or identified. Police say they are due to appear in court later this week.

Anyone with information on the attacks is asked to call the Prince George RCMP detachment at 250-561-3300 or Crime Stoppers at 1-800-222-8477 if they wish to remain anonymous.