A Nigerian Islamist militant group's claims to have killed seven foreign hostages it seized last month are credible, Western governments say.http://www.bbc.co.uk/news/world-africa-21734036
The hostages - from Italy, Britain, Greece and Lebanon - were captured in a raid on a construction site in the northern state of Bauchi.
In an online statement posted on Saturday, the militant group Ansaru said it had killed the captives.
Ansaru is suspected of being an offshoot of the Boko Haram network.
On Sunday, UK Foreign Secretary William Hague said a British construction worker, named as Brendan Vaughan, was "likely to have been killed at the hands of his captors, along with six other foreign nationals".
"This is an unforgivable act of pure, cold-blooded murder, for which there can be no excuse or justification," he added.