The 400-metre hurdles gold medalist has been killed in a road accident, police have said.
The 28-year-old was killed in his home country of Kenya near Nandi a day after returning from the Continental Championships in Nigeria.
His family and police confirmed the tragic news this morning.
Bett is reported to have died on the spot after the car he was driving veered off the road and landed in a ditch.
Police said the athlete hit a bump before losing control of his car.
Bett made history at the 2015 Beijing World Championships when he became the first Kenyan to win a Worlds gold in the hurdles after competing in the 400m race.
He is a also two-time African Championship medallist, whose twin brother Haron Koech is also a 400 metres hurdler.
MORE TO FOLLOW