Finding the flight data and cabin voice recorders of the ill-fated Air France jetliner is the top priority of the ongoing investigation, French Junior Transport Minister Dominique Bussereau said on Sunday.

Brazilian investigators have found more debris, the official said. If they proved to belong to the crashed airliner, it will help further investigations, he said.

But Bussereau said finding these two recorders, more commonly known as black boxes of planes, remained an urgent task, as investigators have only about three weeks to locate the black boxes.

Commenting on reports about problems detected with speed monitors on the Airbus A330, Bussereau said that such a single failure, even if confirmed, can hardly explain the cause of the crash.

He stressed that at the moment investigators still know very little about the crash, adding they cannot confirm nor rule out any possibilities.

The Brazilian Air Force announced on Saturday that two male bodies believed to be victims of the crashed Airbus A330 were retrieved, together with a suitcase containing a plane ticket for the flight, a backpack with a vaccination certificate in it and a cabin seat.

France's air safety investigation agency said earlier that the plane sent 24 failure signals in five minutes before contact was lost, and the cockpit was receiving conflicting speed data.

Meanwhile, Paul-Louis Arslanian, the director of the agency, said he was "not optimistic" about the prospect of finding the black boxes.

The jetliner, an Airbus 330-200 carrying 216 passengers and 12 crew members, went missing on Sunday after losing contact with the control tower on a flight to Paris from Rio de Janeiro.

(Xinhua News Agency June 8, 2009)