One British woman killed in Tunisia museum attack

One unnamed British woman was killed in Wednesday's deadly assault on Tunisia's national museum, Britain's Foreign Office said on Thursday, denouncing the incident as a cowardly and despicable "terrorist attack."

Gunmen wearing military uniforms stormed the museum on Wednesday, killing 20 foreign tourists and three Tunisians in one of the worst militant attacks in a country that had largely escaped the region's "Arab Spring" turmoil.

"The Tunisian people are rightly proud of their democratic transition," British Foreign Secretary Philip Hammond said in a statement, confirming the British woman's death. "Cowardly attacks, such as the one we saw yesterday, must not be allowed to undermine what they have achieved."

Related read: Gunmen storm Tunisian museum, kill 17 foreign tourists