At least 12 people are feared dead after a small aircraft travelling from Kenya’s coast crashed on Tuesday morning, the country’s aviation authority has confirmed.

The Kenya Civil Aviation Authority (KCAA) said the plane was en route from Diani, a popular tourist destination, to Kichwa Tembo, a private airstrip in the Maasai Mara National Park, when it went down around 5:30 a.m. local time (0230 GMT).

“The aircraft had 12 persons on board,” the KCAA said in a statement, adding that government agencies were already at the crash site to determine the cause of the accident.

No further details about the passengers or the cause of the crash were immediately available.

In a similar incident in August, a light aircraft operated by medical charity Amref crashed on the outskirts of Nairobi, killing six people and injuring two others.