Peruvian authorities have found the wreckage of a helicopter that crashed in Peru on Wednesday local time. Local police say all 14 passengers including eight South Koreans are believed to have been killed.

Police said the wreckage of the helicopter was found on Mount Mama Rosa at an altitude of four-thousand-95 meters in the southern Andes. Three Europeans were on board the ill-fated helicopter in addition to the eight South Koreans.

A police officer who participated in the search and rescue efforts told the South Korean Embassy that all 14 passengers including eight South Koreans seemed to have died in the crash.

The South Korean passengers were officials from the state-run Korea Water Resources Corporation, Samsung C&T, Korea Engineering Consultants Corporation and Seoyeong Engineering Company. They were returning from a tour of the site of a potential hydroelectric power plant near Mazuco when the helicopter crashed on June sixth.

The South Korean Embassy in Lima quoted the Peruvian aviation safety authorities as saying that the helicopter seemed to have crashed after hitting the mountain.

The cause of the crash has not been determined. Local police suspect mechanical failure may have caused the crash, but do not rule out bad weather as a possible cause.

The ill-fated helicopter Sikorsky S-58ET had been in service for 37 years after being manufactured in 1975.