Kenya ? A military plane carrying politicians to a peace conference crashed while attempting to land in northern Kenya during bad weather Monday, killing at least 14 people, including two assistant Cabinet ministers.

President Mwai Kibaki declared three days of national mourning.

Four of the 17 people on the plane were pulled from the fiery wreckage alive and flown to Nairobi for treatment, witnesses said. But one survivor died on the way.

The plane crashed into a hill near Marsabit, 280 miles northeast of Nairobi. The politicians on board were heading to a conference intended to ease tribal tensions along the Ethiopian border, Parliamentary Speaker Francis ole Kaparo told a news conference.

“This is the worst tragedy to hit the National Assembly,” Kaparo said with tears in his eyes. “We have lost a lot of very good people in this crash.”