MIAMI — Russia’s Federal Security Service (FSB) chief has reported to president Vladimir Putin that a bomb caused the crash of a Russian-operated Airbus A321 last October 31.

FSB director Alexander Bortnikov told Putin “we have studied the passengers’ personal belongings and luggage and fragments of the plane that crashed in Egypt on October 31. An expert examination of all these objects has found traces of foreign-made explosives.”

The aircraft was transporting an improvised explosive device with an explosive power equivalent to up to 1 kg of TNT. According to Bortnikov, this would explain the mid-air destruction of the aircraft and why the debris were scattered over a large area.

“You can definitely say that this is an act of terrorism,” he stated.

The explosion caused the killing of all 224 onboard the aircraft bound to St. Petersburg from the Egyptian resort city of Sharm el-Sheik.

Putin assured that this was “not the first time” Russia faced a terrorist attack, reminding the Volgograd rail station bombing occurred at the end of 2013, and called to strength Russia’s military air operation in Syria, “so as to make it clear to the criminals that vengeance is inevitable.”

“We will look for them wherever they might be hiding,” he said. “We will find them anywhere in the world, and punish them.” Putin said.