French investigators have no further clues on what caused the crash of an Air France jetliner in the Atlantic two weeks ago, the head of France's investigation agency said yesterday.

More information might be available in the coming days, Paul-Louis Arslanian told reporters, urging the public to show "a lot of patience" while the search for wreckage and bodies continued in the Atlantic Ocean.

He was speaking at a news conference on the search efforts and what investigators called "unfavourable conditions" in the remote area of ocean where the Airbus A330 crashed en route from Brazil to Paris on June 1.

The investigation agency has so far said data transmitted from the plane before it crashed indicated unreliable speed readings from the aircraft's sensors, but that it was too early to say whether this contributed to the accident.

All 228 people on board the plane died in the crash, making it the worst disaster in the history of Air France.

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