The British Prime Minister David Cameron says up to seven British people were killed in the Algerian hostage crisis.
Three British nationals are now known to have died - with a further four feared dead.
The Algerian Government meanwhile says it believes the death toll of 23 hostages will rise.
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The standoff ended yesterday after Algerian troops stormed the complex - killing 32 militants.
British Prime Minister David Cameron says the attack is an example of the growing threat posed by Al-Qaeda linked militants in North Africa.