Tunisia's Prime Minister Habib Essid has announced a clampdown on security after an attack on a holiday resort in which 38 people were killed.

He said army reservists would be deployed to archaeological sites and resorts.

About 80 mosques accused of "spreading venom" will close within a week, he said.

Authorities say most of the victims in Friday's attack near Sousse were Britons. The gunman was shot dead.

He was identified as Seifeddine Rezgui, a student who was not previously known to authorities, officials said.

Five Britons were confirmed dead and the Foreign Office warned the death toll could rise.

Tunisians, Germans, Belgians, French and at least one Irish citizen were also among those killed in the attack, which was claimed by Islamic State (IS). Thirty-six people are injured, officials say.

It was the second major attack on tourists in Tunisia since March, when militants killed 22 people, mainly foreigners, at Bardo museum in Tunis.

(BBC)