More than 10 people have been killed after Israeli commandos stormed a convoy of ships carrying aid to the Gaza Strip, the Israeli army says.Full report here. You can follow this Twitter feed and website for news as it happens.
Armed forces boarded the vessels overnight, clashing with some of the 600 protesters on board.
The exact location of the interception is unclear. Israel had warned the ships not to enter its territorial waters.
The ships are carrying 10,000 tonnes of aid to try to break a long-standing Israeli-led blockade.
Israel says its forces were attacked by activists when they got on board.
"The people on the boats were very, very violent toward the soldiers," Israeli military spokeswoman Lt Col Avital Leibovich was quoted as saying by AFP news agency.
Organisers of the flotilla said at least 30 people were wounded in the incident.
An Israeli government minister, Binyamin Ben-Eliezer, was reported as expressing regret for "all the fatalities".
Turkey, one of whose charities is a main organiser of the flotilla, said it "strongly condemn[ed] these inhumane practices of Israel", AFP said.
Turkish TV pictures taken on board the Turkish ship leading the flotilla appeared to show Israeli soldiers fighting to control passengers.
The footage showed a number of people, apparently injured, lying on the ground. It is not clear whether the fighting is continuing.
There's is a protest outside Downing Street TODAY at 2pm.
8:45 update: The Israelis' chief spokesman has just been on BBC News defending the action in his usual pugnacious manner. He is arguing the commandos were attacked first and claims the footage of the raid shows this - completely ignoring that these commandos were heavily armed and boarding a ship they knew contained nothing more than peace activists.
This is where he tried to muddy the waters. Despite knowing the humanitarian nature of the flotilla he tried claiming the Israeli government was "unclear" about whether the ships were carrying weaponry. If they had nothing to hide then why didn't they put in at an Israeli port?
These look like the main lines of argument apologists will be pursuing over the next few days.
Footage here and here.