A British hostage has been killed during an attempted rescue mission in Nigeria, David Cameron has said.
The effort to free Chris McManus, from the North West of England, and an Italian hostage was launched by Nigerian forces with the assistance of the UK.
The Prime Minister said the pair appeared to have died at the hands of their captors, either before or during the course of the rescue bid.
It was launched after the UK received credible information about their whereabouts and that their lives were under increasing threat, a spokeswoman said.
Mr McManus's family said they were "devastated by the news" of his death but thanked those involved in the attempt to rescue him.
Mr McManus, a contract worker for the construction company B.Stabilini, was kidnapped by a "horde of gunmen" in May last year.
Raiders stormed his apartment in Birnin-Kebbi, in the north west of the country, and captured him along with Mr Lamolinara.
A German colleague managed to escape by scaling a wall but a Nigerian engineer was shot and wounded in the raid.
The men were in the city building a bank.
In December last year, a Nigerian group calling itself "Al Qaida in the land beyond the Sahil" announced it had captured Mr McManus.