Brendan Vaughan, the British man thought to have been killed in Nigeria by an Islamic extremist group, was "likely to have been murdered in cold blood", the Foreign Secretary said.
William Hague added that the UK had "worked closely" with Nigeria over the last few weeks, and expressed his thanks to the Nigerian authorities.
More top news
Super substitute Jill Scott marked her 101st international appearance with the winner as England squeezed past a stubborn Bosnia side
Conservative Party chairman Lord Feldman is being interviewed in an internal inquiry into bullying after the death of a young activist.
Former Davis Cup finalist John Lloyd led the tributes to Andy Murray, who ended Great Britain's 79-year wait for the famous trophy