A bomb placed onboard? Russian airliner 'broke up in mid-air'

The Russian plane which crashed killing 224 people broke up in mid-air, it was confirmed today.

The revelation heightens the chances a bomb had been planted onboard the plane before it left the Egyptian tourist resort of Sharm-el-Sheikh.

ISIS affiliates have already claimed responsibility for the tragedy - although security experts scast serious doubt on their claim.

Egyptian Prime Minister Sharif Ismail said experts had confirmed that a plane could not be downed at 9,450m (31,000ft), the altitude the Airbus 321 was flying at, by weapons the militants are known to possess.One un-named official told Reuters the plane appeared to have split in two, with one part burning up and the other crashing into a rock.