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.
Armed forces boarded the largest vessel overnight, clashing with some of the 500 people on board. It happened about 40 miles (64 km) out to sea, in international waters.
Israel says its soldiers were shot at and attacked with weapons; the activists say Israeli troops came on board shooting.
There has been widespread condemnation of the violence, while the European Union has called for an inquiry to establish what happened.
'Guns and knives' The six-ship flotilla, carrying 10,000 tonnes of aid, left the coast of Cyprus on Sunday and had been due to arrive in Gaza on Monday.
Israel says its soldiers boarded the lead ship in the early hours but were attacked with axes, knives, bars and at least two guns
"Unfortunately this group were dead-set on confrontation," Israeli government spokesman Mark Regev told the BBC.
"Live fire was used against our forces. They initiated the violence, that's 100% clear," he said.
Organisers of the flotilla said at least 30 people were wounded in the incident. Israel says 10 of its soldiers were injured, one seriously.
A leader of Israel's Islamic Movement, Raed Salah, who was on board, was among those hurt.
Audrey Bomse, a spokesperson for the Free Gaza Movement, which is behind the convoy, told the BBC Israel's actions were disproportionate.
"We were not going to pose any violent resistance. The only resistance that there might be would be passive resistance such as physically blocking the steering room, or blocking the engine room downstairs, so that they couldn't get taken over. But that was just symbolic resistance."
Israel is towing the boats to the port of Ashdod and says it will deport the passengers from there. It says it will deliver the ships' aid to Gaza.
