Traces of foreign explosives have been found on fragments of the aircraft A321, the FSB director reports.

      The air disaster of the Russian aircraft over Sinai was caused by an act of terrorism with a handmade explosive device with the explosion yield of up to 1 kg in trotyl equivalent. This was reported by the head of the FSB Alexander Bortnikov.

      Passengers' personal belongings, baggage and fragments of the aircraft were thoroughly examined.

      "Now one can definitly state that it was an act of terrorism", - he concluded.