The leader of an Indonesian cult who sermonised in his underpants and demanded that his acolytes perform in sex orgies has been jailed for blasphemy, a judge said Friday.

Agus Noro, also known as Agus Imam Solihin or "leader of the faithful," was found by the South Jakarta district court to have blasphemed against Islam, lead judge Haryanto said.

The court found Noro forced four married couples belonging to his Satria Piningit Weteng Buwono cult, meaning "Chosen Warriors from the Belly of the World," to perform group sex in his house in 2003 while he and two teenage followers watched...