Five Americans and the head of Ecuador’s intelligence agency died after a helicopter carrying tourists crashed in central Kenya Wednesday.

The aircraft was traveling from the Loisaba wildlife conservancy to the Ewaso Ngiro river area when it crashed around 9:13 a.m. at Mount Ololokwe in Samburu county, north of the capital, Nairobi, according to the country’s civil aviation authority.

All seven people on board the aircraft died, Samburu County Police Commander David Nkoroi told reporters.

The helicopter was carrying guests from the luxury tour agency &Beyond on a charter flight, according to operator Lady Lori Helicopters.

The cause of the crash has not been determined and an investigation is underway, the country’s civil aviation agency said.