JERUSALEM, Isarel (AP) A defiant Israel enforced its three-year-old blockade of Hamas-ruled Gaza yesterday, with naval commandos swiftly commandeering a Gaza-bound aid vessel carrying an Irish Nobel laureate and other activists and forcing it to head to an Israeli port instead.

The *lo**less take-over stood in marked contrast to a deadly raid of another Gaza aid ship last week. However, it was unlikely to halt snowballing international outrage and demands that Israel lift or at least loosen the devastating closure that confines 1.5 million Palestinians to a small sliver of land and only allows in basic humanitarian goods.

For now, the confrontations at sea are likely to continue.

The organisers of yesterday's sail said they planned to dispatch as many as three more ships in coming months, and that four captains already have volunteered for the missions.

"What Israel needs to understand is that nothing is accomplished with force," said Greta Berlin of the Cyprus-based Free Gaza group, which sent the latest aid vessel, the Rachel Corrie.

Israel said it would block any attempt to reach Gaza by sea, in order to prevent weapons from reaching the Iranian-backed Islamic militant group. "Israel ... will not allow the establishment of an Iranian port in Gaza," Prime Minister Benjamin Netanyahu said.

At the same time, Israel yesterday signalled it is considering easing the blockade, although officials provided no details. Israel and Egypt closed Gaza's borders after Hamas seized the territory three years ago from Western-backed Palestinian President Mahmoud Abbas.

Yesterday's take-over of the 1,200-ton ship was over in minutes.

After trailing the vessel for six hours across the Mediterranean, Israeli commandos boarded it from speed boats around noon, in international waters about 20 miles (30 kilometres) from Gaza, and forced it to sail to the Israeli port of Ashdod.

Footage from an Israeli aircraft showed the passengers sitting quietly in two rows on the top deck. A man described by the Israeli military as the captain got up, raised his arms and walked toward the soldiers.

The military said the crew of the Rachel Corrie dropped down one of the ship's ladders to make it easier for the forces to board.

The activists could not be reached to describe the events because communication with the ship was cut during the operation. Berlin called the take-over an outrage.

The 11 passengers and eight crew members will be deported, although those who object will be detained and given a chance to appeal, officials said.

Those aboard included Mairead Corrigan, who won the 1976 Nobel Peace Prize for her work with Catholics and Protestants in Northern Ireland, and the former U.N. humanitarian co-ordinator in Iraq, Denis Halliday.

Sabine Haddad, spokeswoman for the Israeli Interior Ministry, said that all 19 were being held at Israel's international airport Saturday night, and that eight agreed to leave voluntarily on Sunday. The remaining activists, including Corrigan and Halliday, were challenging the deportations, though Haddad said she expected some of them to change their mind and leave voluntarily.

While in radio contact, the Israeli navy officers addressed the boat as "Linda" -- the vessel's name before it was renamed for Corrie, an American college student crushed to death by an Israeli army bulldozer during a 2003 Gaza protest.

Saturday's non-violent operation came nearly a week after a chaotic take-over of a six-ship flotilla by Israel, also in international waters. In that confrontation, Israeli forces rappelled from a helicopter onto the deck of the Turkish lead ship, clashed with club-wielding activists awaiting them and at some point opened fire.

Eight Turks and a Turkish-American were killed, and a preliminary autopsy report released by Turkey yesterday said they were shot a total of 30 times. Of the nine, five were shot in the head and back, and one was shot from close range, the report said.

Israel said its forces acted in self-defence against what it described as Islamic extremists.

However, the outcry over the aid ships has been a public relations nightmare for Israel, while giving Hamas a welcome boost.

Northern Ireland's deputy First Minister Martin McGuinness said yesterday the Rachel Corrie should have been allowed to reach Gaza "without Israeli aggression." In Stockholm, the Swedish dockworkers' union said it would persuade members not to service Israeli ships for a week, starting June 15.

In Tel Aviv, a demonstration marking the 43rd anniversary of Israel's occupation of the West Bank and Gaza turned into a protest against the blockade. "The government is drowning all of us," a sign read. Another protest by thousands in Paris included a large parade-style float representing an aid ship.

The United States, Israel's closest ally, on Friday joined other nations in saying the blockade in its current form is not sustainable. An infuriated Turkey said it would minimise relations with Israel, once a close regional ally.

The blockade, meant to dislodge Hamas, initially enjoyed the tacit support of many in the international community. Under the restrictions, Israel bars virtually all exports and most imports, including construction supplies.

Critics say the restrictions have been counterproductive, strengthening Hamas, wiping out tens of thousands of jobs and hampering UN-led efforts to rebuild what was destroyed in Israel's war on Gaza 16 months ago.

Most commercial goods, along with cash and weapons, are now funnelled through hundreds of Hamas-controlled smuggling tunnels under the Gaza-Egypt borders. With unemployment high, many Gazans cannot afford to buy the smuggled merchandise.