Two more of the British hostages held in Iraq are now thought "very likely" to be dead, according to the BBC.
Security guards Alan McMenemy, from Glasgow, and Alec Maclachlan, from Wales, were kidnapped in 2007 along with three other Britons.
The bodies of two of the other men were found in June with gunshot wounds.
The condition of the fifth man, Peter Moore, is not known. The Foreign Office says all efforts are being made to secure the hostages' release.
Mr Moore had been working for American management consultancy Bearingpoint in Iraq, while the other men were security contractors employed to guard him.
The group were captured at Baghdad's Ministry of Finance in May 2007 by about 40 men disguised as Iraqi policemen.
They are understood to belong to an obscure militia known as Islamic Shiite Resistance in Iraq.
The Foreign Office told the families of Mr McMenemy and Mr Maclachlan last week that the men had most likely died while in captivity, the BBC reports.
It is Britain's longest running hostage crisis for nearly 20 years.
Britain was an ally of the United States in the invasion of Iraq in 2003, but has now withdrawn all but about 500 troops from the country.
