Investigators probing the crash of an Air Algerie flight in Mali that killed 116 people in July said on Saturday there was no obvious lead yet and all possibilities, including terrorism, were being explored.

"At the moment... nothing is telling us that we can rule out or confirm terrorism. We are not favouring any line of inquiry," Bernarde Boudaille, of France's Bureau of Investigations and Analyses (BEA) air safety agency, told reporters.