AMPATUAN, Philippines - Authorities say a scion of a powerful clan suspected in the massacre of 57 people in an election caravan in the southern Philippines has turned himself in.

The dead from Monday’s massacre include the wife, family and dozens of journalists and supporters of a gubernatorial candidate who wanted to challenge the rival Ampatuan clan, which has ruled the lawless province of Maguindanao unopposed for years.

Army Lt. Gen. Raymundo Ferrer says Andal Ampatuan Jr., a town mayor who allegedly stopped the convoy with four police commanders and dozens of police and pro-government militiamen, surrendered to presidential peace adviser Jesus Dureza in the provincial capital.