This is the moment a 'monster' confesses to seeking to kill a helpless boy, one, who had fled the conflict between Israel and Iran.

Appalling footage showed the Belarus man, 31, a nuclear power plant construction worker, pick up and hurl the child on the ground of the arrivals hall of a Moscow airport.

The child had arrived in Russia minutes earlier after he and his mother fled the bombing in Iran, say reports.

Little Yazdan, aged 18 months, is now fighting for his life with serious skull fractures and spinal injuries.

The man, Vladimir Vitkov, was reported by some outlets to have been on the same flight as the child and his mother who were escaping from war-ravaged Iran where they had been visiting relatives.