British Foreign Secretary William Hague said Monday that London was in touch with Nigerian authorities following reports that a Briton was among seven foreign workers abducted from a construction site.
"I'm very concerned of course that there has been another kidnap in northern Nigeria," Hague said on arrival for talks among European Union foreign ministers in Brussels mainly focused on whether or not to arm Syrian opposition forces.
"We are in touch with the Nigerian authorities about this," Hague said, adding: "I can't tell you any more about that at the moment, but we will give you more information as we can."
Gunmen stormed the building site late on Saturday, kidnapping seven and killing a security guard.
Two Lebanese, an Italian and a Greek have been confirmed by their governments to be among those seized in the town of Jama'are in Bauchi State.
On Sunday, Hague's Foreign Office said only that it was "aware of reports" that a Briton was seized and was making enquiries.