Relatives of two Australians and an American who disappeared on a surfing trip arrived in Mexico Sunday to identify their presumed bodies, which were found with gunshot wounds to the head, authorities said.

Brothers Callum and Jake Robinson, and their friend Jack Carter, were believed to have been killed during a botched theft of their pick-up truck, state prosecutor Maria Elena Andrade said at a press conference.

Bodies presumed to belong to the three men “all have a hole in their head made by a firearm projectile,” Andrade said, adding that the trio had previously visited Mexico several times without any problems.

Three suspects, two men and one woman, have been detained on suspicion of involvement in the case, according to…