Four young men are facing gang sexual assault and child pornography charges in connection with the alleged videotaped attack of a 16-year-old girl.

Peel police say the girl was at a Mississauga home on February 25 when she fell unconscious for an unknown reason.

The four males then allegedly sexually assaulted her and took photographs and videotaped the incident on their cellphones, police said.

The victim was taken to a medical facility and treated for minor physical injuries.

Two 18-year-old Mississauga men, Philip Perry and Barton Reeder, have been charged with sexual assault, sexual assault with a weapon, gang sexual assault and manufacturing child pornography.

Two 17-year-old boys from Mississauga, who cannot be identified under the Youth Criminal Justice Act, face similar charges.

Three of the co-accused attend Cawthra Park Secondary School in Mississauga.

Police say an investigation has revealed at least one more young female victim. Detectives are concerned there are other girls who have not yet contacted police.

Anyone with information is urged to contact the Special Victims Unit at 905-453-2121 ext. 3460, Det. Riemenschneider, or Peel Crime Stoppers at 1-800-222-TIPS (8477).