Gavin Campbell, 20 (left), Trian Vassel, 19 (centre) and Keyon Small, 20 (right) have been charged in sexual assault investigation. Police believe there may be other victims

Police believe there may be more victims after three men allegedly lured and sexually assaulted a 13-year-old girl in Toronto.

Police say a 19-year-old man made contact with the female teen in July 2015 and managed to lure her into his home a month later.

Once inside, the male suspect and two friends sexually assaulted the girl, police say.