Kenyan Transport Minister Chirau Ali Mwakwere said in a statement that investigators on the ground had established that the aircraft lost height and hit trees and a roof of a house before crashing.

"From the way it crashed, there was no chance for anyone to survive," the minister said, adding that the aircraft's wings were ripped off by trees and its main trunk ripped into pieces.

Preliminary investigations had also indicated that the German pilot flying the aircraft was fairly new in the country and might not have mastered the terrain, according to the minister.

The light Cessna 210 aircraft registration 5Y-BVE operated by Skytraders Limited crashed near Narok town killing Roads Minister Kipkalya Kones, Home Affairs Assistant Minister Lorna Laboso, the minister's bodyguard and the pilot.

The minister's statement came as the bodies of the deceased were airlifted to Nairobi from the Kojong'a air crash site in Narok.

Addressing mourners at the airport, Prime Minister Raila Odinga said the government will foot all the burial costs of the deceased.

"The government shall give them decent burial befitting heroes. It is the greatest gift to give them," he said. He appealed for calm and cautioned against speculation over the cause of the crash.

"Let us all be patient so that thorough and conclusive investigations can be done," he said. Vice President Kalonzo Musyoka said the government would make every effort to ensure speedy investigations into the crash.

Musyoka said the country had lost committed ministers. He described the late Kones as a hero in every sense who stood through thick and thin with his Bomet people.

Mwakwere's statement stated that the government would issue a full report as soon as investigations are completed.

Agriculture Minister William Ruto said that the plane did not burst into flames as earlier claimed. He ruled out possible engine failure and explained that the Kenya Civil Aviation (KCA) team on the ground had indicated in its preliminary report that the engines of the aircraft were still running, but were ripped off by the time of the crash.

The KCA team headed by Peter Wakahia, director of Air Accident Investigations in the ministry, has already cordoned off the area and further investigations are ongoing.

Ruto who led other senior government officials to the crash scene said the wreckage of the aircraft indicated that it was in high speed by the time it smashed, but adding that there may have been a combination of issues that could have caused the accident and urged the KCA team to conduct comprehensive investigations.

Speaker of the National Assembly Kenneth Marende expressed regret that the country had already lost four legislators just within six months.

"It is a sad spectacle because the year has been exceptionally difficult for the Parliament. It is very sad and painful and we shall miss their contribution and vibrancy," he stated.

The parliament also adjourned till Thursday in honor of their dead colleagues. The deaths of the two parliamentarians came just a day before by-elections which are conducted in five constituencies.