A plane crash in Libya that killed 103 people on 12 May was not caused by mechanical failure, according to a preliminary inquiry.
The "black box" recorders indicated that the Afriqiyah Airways plane had enough fuel and made no call for help.
A nine-year-old Dutch boy was the sole survivor of the crash.
Most of the dead were Dutch citizens killed when the plane missed the runway at Tripoli airport as it flew in from South Africa.
Neji Dhaou, head of the Libyan commission investigating the crash, said the causes remained unknown and indicated it could be some time before his conclusions were ready.
"There is no sign indicating a technical failure in the plane before the incident, according to data recovered up until now from the two black boxes," he said in a statement reported by Reuters.
The flight recorders were sent to Paris for an examination that was overseen by international observers.
After studying the recorders, officials also ruled out a terrorist act as a potential cause.
The Airbus 330 was carrying 93 passengers and 11 crew.
Some 70 of the dead were Dutch citizens; all of the crew were Libyan.
The airline said nationals from South Africa, the UK, Austria, Germany, Zimbabwe and France were also killed.