**Video apparently showing extra-judicial killings by Sri Lankan troops is most probably genuine, a UN envoy has said.**UN special rapporteur Philip Alston said three independent experts had confirmed the video was authentic, renewing calls for a war crime inquiry.
The footage shows a man dressed as a soldier shooting a man in the head.
It was allegedly filmed in January during the final stages of the bloody conflict with Tamil Tigers rebels. Sri Lanka says the video was fabricated.
The footage also shows other bodies on the ground. It is not clear where it was shot.
The video was provided to the BBC and other media organisations by a group called Journalists for Democracy in Sri Lanka, which said it showed “the reality of the behaviour of the government forces during the war”.
Government troops victory over the Tamil Tigers (LTTE) in May after months of fierce fighting.
Journalists for Democracy in Sri Lanka said the video had been taken in January 2009.