Plane over Sinai downed in terror act: Russia's security chief

Russia's security chief told President Vladimir Putin that a plane carrying 224 people over Sinai was downed due to a "terror attack," the Kremlin said today.

"One can say unambiguously that it was a terror act," the head of the FSB security agency, Alexander Bortnikov, told Putin in a meeting the day before.

Citing experts, he said the plane disintegrated in midair due to a bomb with the equivalent of a kilo of TNT.

Putin vowed to 'find and punish' those behind Sinai plane attack.