The accident happened in Samburu County, north of the capital Nairobi, according to the Kenya Civil Aviation Authority (KCAA).
The aircraft had departed from the Loisaba wildlife reserve.
Images shared by the Kenya Red Cross on X in the afternoon showed a crash site in flames. It said difficult terrain hampered rescue operations.
"There were seven people on board the helicopter, one pilot and six passengers," Fredrick Kabunge, director of the Aircraft Accident Investigation Department (AAID), told AFP, confirming that no one had survived.
Contacted by AFP Wednesday evening, Samburu County police chief David Nkoroi said "operations have been suspended until tomorrow because of darkness and the complex nature of the ground and the scene of the crash."
