About 40 Britons have been detained by Israeli authorities after a raid on an aid flotilla bound for Gaza, Foreign Secretary William Hague has said.
At least 10 people were killed when commandos stormed a boat, but no Britons are thought to be among them.
Mr Hague said he expected the 41 Britons held in a southern Israeli prison to be deported "very quickly".
The UN Security Council has called for an immediate and impartial inquiry.
Mr Hague said the numbers were not certain as some people had destroyed their passports, but it is thought among those detained were 30 British nationals and 11 dual nationals.
