Russia rules Sinai plane crash which killed 224 as an act of terror

After lots of speculation,Russian security services have admitted that they have found traces of explosives on a passenger jet which was blown up over Egypt's Sinai peninsula killing all 224 people on board.
The flight A321 disappeared 23 minutes after leaving Sharm el-Sheikh airport en-route to St Petersburg. ISIS claimed responsibility for the attack.

Alexander Bortnikov, head of the FSB security agency told Russian President Vladimir Putin: 

'One can say unambiguously that it was a terror act.' "In the estimates of our specialists, a self-made explosive device with its power of up to 1 kilogram in TNT equivalent went off aboard the airliner, due to which the plane broke up in the air and this explains the spread of the plane's fuselage parts over a large distance,"