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Mass grave site unearthed in Sri Lanka

17 January 2014 Last updated at 17:12 GMT

Excavation work is under way at a mass grave recently discovered by construction workers in northern Sri Lanka.

Four more human skulls have been discovered there, bringing the number of skeletons or partial skeletons that have been found to 31.

It is the first site to have been unearthed and examined in the island's former war zone since the war ended in 2009.

Charles Haviland reports.

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