The government figure for the number of Britons killed in the Nairobi shopping mall attack has been reduced from six to five.
The Foreign Office said one of the victims previously thought to have been a UK national was Kenyan.
However, a spokeswoman warned that the casualty figure could still rise further as the authorities continue to comb the scene.
"We can now confirm that on present information five British nationals have been killed in the recent terror attacks in Nairobi," she said.
"One individual previously thought to be British is a Kenyan national. Our thoughts are with his family and with the friends and family of all of those who have died during this difficult time.
"We have no information at this time that any further British nationals have been killed, although we cannot rule out the potential for further British casualties and we continue to stay in close contact with the Kenyan authorities as their investigations continue."