- 8 updates
The Islamist group Ansaru has claimed the kidnapping of seven foreigners, believed to include at least one Briton, in a deadly raid on a construction site in northern Nigeria, according to the Associated French Press.
In an email statement the group said it has "the custody of seven persons, which include Lebanese and their European counterparts working with Setraco."
Foreign Secretary William Hague said he was "very concerned there has been another kidnap in northern Nigeria."
A British worker is believed to be among seven international workers who were kidnapped by Islamic extremists in Bauchi.
Mr Hague added that the Foreign Office was "in touch with Nigerian authorities."
The Home Office is not confirming or denying whether any British workers have been involved.
But officials say they are investigating reports which suggest at least one Briton was taken when gunmen stormed a compound belonging to a Lebanese construction company in Nigeria.
ITV News reporter Sejal Karia talks from outside the Foreign Office:
Nigeria's north has been under attack by the radical Islamic sect known as Boko Haram in the last 18 months and foreigners have become increasingly targeted as the violence has grown.
- In May, gunmen in northern state Kaduna killed a Lebanese and Nigerian construction workers while kidnapping another Lebanese employee.
- Later that month, kidnappers shot a German hostage during a rescue operation.
- Authorities said gunmen linked to Boko Haram kidnapped an Italian and British man last year who were later killed during a rescue operation by Nigerian soldiers.
- Chinese construction workers have also been killed by gunmen around Maiduguri, a north-eastern city in Nigeria.
The sect has been blamed for killing at least 729 people in 2012, according to an Associated Press count.
Gunmen attacked a camp for a construction company in north Nigeria, killing a guard and kidnapping seven foreign workers including one from Britain, authorities told the Associated Press.
The attack happened on Saturday night in Jama'are, Bauchi, a region under attack by Islamic extremists, where gunmen first targeted a local prison, burning two police trucks, Bauchi state police spokesman Hassan Muhammed said.
The gunmen then attacked a workers camp for construction company Setraco where they shot dead a guard before kidnapping one British, one Greek, one Italian and four Lebanese citizens.
Britain's Foreign Office said it was looking into reports that a UK national had been kidnapped in Bauchi state.
People from Britain, Italy, Greece and Lebanon have been kidnapped in north Nigeria, according to the Associated Press.
Police say seven foreign construction company workers have been kidnapped in north Nigeria, according to Associated Press.