Earlier on Friday, an unnamed official in the investigation committee told AP news agency that the voice recorder's data was already being analysed by experts, including representatives of France's air safety agency and the plane's manufacturer, Airbus.

The Egyptian-led investigation team, already assisted by investigators from France's BEA air accident investigation agency, will now be joined by two representatives of the U.S. National Transportation Safety Board (NTSB).
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Egypt said on Monday it had accepted a request by the NTSB to have representatives join the investigation team.