The plane carrying Bin Laden's family crashed due to an excessively fast landing.

British authorities have concluded that the plane carrying Osama bin Laden's family that crashed last year, killing four people, was due to the pilot landing too fast while "mentally fatigued".

The UK Air Accident Investigation Bureau (AAIB) announced today (December 8) that a Phenom 300 jet departing from Milan, Italy, landed 40% over the permitted speed limit when it was only 438 meters from the runway on July 31, 2015, according to the BBC.

The scene of the plane crash carrying three members of Bin Laden's family. Photo: Mirror

The 57-year-old Jordanian pilot made a landing error due to "overwork." The plane hit the ground at 250 km/h, crashing into a car park near Blackbushe Airport in London.

Three members of terrorist leader Bin Laden's family – his stepmother Raja Bashir Hashem, 75; his half-sister Sana, 53; and another relative, 56 – along with a pilot, were killed in the fire that erupted after the plane crashed.

According to VNE