Updated

A New York-based human rights group is calling for Jamaican police to conduct a full investigation into the mob killing of a teenage cross-dresser.

Gay advocates say Dwayne Jones was found dead on July 22 near Montego Bay after being attacked by a crowd of people while attending a dance party in women's clothing. The 16-year-old was stabbed multiple times and shot once.

Human Rights Watch said Thursday that authorities need to send an "unequivocal message that there will be zero tolerance for violence against lesbian, gay, bisexual, and transgender people."

Justice Minister Mark Golding has condemned the slaying and says police "must spare no effort" in finding the killers.

Activists say Jamaican gays, particularly those in poor communities, suffer frequent discrimination. The island's anti-sodomy law bans anal sex.