Airwing Commander Rodgers Mbithi confirmed that the aircraft had only five occupants and all the persons on board perished in the crash.
Three of the foreigners were identified as Americans - two women and a man - while one remained unidentified, a police source told AFP on condition of anonymity.
Rescuers work to move the wreckage of a Cessna 206 light aircraft that crashed at Londiani in Kericho district, some 220 km northwest of Nairobi, on February 13, 2019.
At least two Americans were among five killed after a small plane carrying tourists from a nature reserve in western Kenya crashed Wednesday after attempting an emergency landing, officials and witnesses said.
Villagers mill near the wreck of the ill-fated plane.
The cause of the crash was not immediately established and investigators have started investigations.
In June a year ago, a plane belonging to the FlySAX airline crashed on the edge of the Aberdares mountain range, leaving 10 people dead.
Kenya has a vibrant airline industry, with national airline Kenya Airways operating internationally and locally alongside successful low-priced airlines and charter companies.
The IATA said Kenya's air transport infrastructure quality ranks 6th out of 37 countries surveyed in Africa.
In 2000 another Kenya Airways flight from Abidjan to Nairobi crashed into the Atlantic Ocean minutes after take-off, killing 169 people while 10 survived.
The plane is reportedly operated by Safari Link. This is not the case and the error has since been corrected.