A Kenyan cabinet minister and an assistant minister were killed with two other people Tuesday when their small plane crashed in southwestern Kenya, officials said.

Roads Minister Kipkalya Kones and Assistant Home Affairs Minister Lorna Laboso died in the crash, Salim Lone, spokesman for Prime Minister Raila Odinga, told The Associated Press.

"This is unbearable news of these deaths," he said.

There were no survivors, Lone said. The other victims were the pilot and a bodyguard, police said.

The plane went down in Narok, about 75 miles from the capital, Nairobi, according to Kenya's Civil Aviation Authority.

Kones was a five-term lawmaker whose appointment to the cabinet was part of a power-sharing deal between President Mwai Kibaki and Odinga. Laboso, a new lawmaker, was among the small number of women elected to Kenya's National Assembly.

In 2006, two assistant cabinet ministers and two lawmakers were among more than a dozen people who died when a military plane crashed while trying to land during bad weather.

In 2003, a plane carrying four cabinet ministers crashed in western Kenya, killing one minister and the two pilots. A public inquiry recommended no more than three cabinet ministers or senior government officials should travel on the same flight, for security reasons.

The report also said many airstrips in the country were poorly maintained and the government did not allocate enough money for repair and maintenance.