A pilot and a technician were killed Saturday when a helicopter hired by the MTV reality show The Challenge crashed into a reservoir in western Argentina, local authorities told The Associated Press.

The cause of the crash has not yet been determined, and investigators are searching for underwater wreckage. Neither of the people who died were members of The Challenge's cast or crew.

This is the second fatal helicopter crash connected to a TV show in Argentina this year. In March, 10 people, including eight cast members of a French reality show called "Dropped," were killed when two helicopters collided in midair. That show was later abandoned.