Britain's Foreign Secretary Philip Hammond on Thursday confirmed that a British woman, Sally Jane Adey, was among those killed in the shooting at the Bardo Museum in Tunis.
"I can confirm the death of a British woman in yesterday's (Wednesday) terrorist attack in Tunisia. Consular staff are providing assistance to her family. My thoughts are with them at this very difficult time," Xinhua news agency quoted Hammond as saying.
Hammond, who is in Nairobi, said the shootings were "cowardly attacks", BBC reported on Thursday.
At least 19 people died in the attack. The victims included two Tunisians and tourists from Britain, Japan, Italy, Colombia, Australia, France, Poland and Spain. More than 40 people, including tourists and Tunisians, were injured.