A light aircraft crashed on Wednesday near Makutano Forest in Londiani, Kericho County, killing all the five passengers on board.
Confirming the incident, National Police Airwing Commander Rodgers Mbithi said all the five occupants of the Cesna 206-5-Y BSE had perished.
They include three men and two women, four whites and one black man, whose nationalities are yet to be established.
The plane reportedly developed a mechanical problem before hitting a tree.
The plane is operated by Safari Link, Londiani Deputy County Commissioner Justus Munyao said.
The plane was ferrying the passengers from Ol Kiombo in the Mara to Lodwar in Turkana County.
The craft crashed on Masaita Forest View Village and landed on a farm a few minutes after 11am.
Rift Valley Police Commander Edward Mwamburi said police and rescue teams were headed to the scene.
The cause of the crash was not immediately established and investigators have started investigations.