Authorities find "evidence" while searching for missing Australian, American surfers in Mexican region plagued by cartel violence

Mexican authorities said Thursday they have found tents and questioned three people in the case of two Australians and an American who went missing over the weekend in the Pacific coast state of Baja California, a popular tourist destination that is also plagued by cartel violence.

Australian brothers Jake and Callum Robinson and their American friend have not been seen since April 27, officials said.

María Elena Andrade Ramírez, the state's chief prosecutor, would not say whether the three people questioned were considered possible suspects or witnesses in the case. She said only that some were tied directly to the case, and others indirectly.