A Sudanese relief plane crashed and burned early Tuesday while trying to land at Nairobi's international airport in heavy fog, killing all 10 people aboard, airport authorities said.

The dead, seven crew members and three passengers, were all Sudanese nationals, said Mike Fernandez, an official with Trade Winds Express Ltd., the Kenyan company handling the jetliner's cargo.He said their identities were not known but the passengers apparently were working with the relief effort.

The Boeing 707 was arriving from Sudan's capital, Khartoum, to pick up emergency relief supplies destined for famine-threatened southern Sudan when it crashed at 4:18 a.m., said B.A. Omuse, director of Kenyan airports.

The aircraft overshot the runway at Jomo Kenyatta International Airport once and was making a second attempt at landing when it crashed, said Fernandez. The plane hit electric cables and a post supporting the power lines, said an airport source.

Debris was spread over a wide area in an empty field about two miles from the runway. Nobody was injured on the ground, Omuse said.

The plane was chartered from Sudania, a Sudanese company, by Trans Arabian Transport, also of Sudan. The aircraft was to ferry emergency food belonging to the Lutheran World Federation.