French investigators say the search for the black boxes of Flight 447 is continuing although they are no longer certain to emit signals.
The flight's voice and data recorders are guaranteed to emit signals for 30 days after an accident. Tuesday marks 30 days since Air France Airbus A330 plunged into the Atlantic. All 228 people aboard were killed.
Martine del Bono, spokeswoman for the French air accident investigation agency, says it "is continuing the search" as long as there is a "reasonable" chance of locating the black boxes.
She gave no final deadline Tuesday for ending the search.
The black boxes could be key to determining what happened to the plane.
Brazil has ended the search for more bodies.