HAIFA, Israel — Israeli warships attacked at least one of the six ships carrying pro-Palestinian activists and aid for blockaded Gaza, killing at least two and wounding an unknown number of people on board, an Arabic satellite service and a Turkish TV network reported early Monday.
The Israeli military denied that its forces attacked the boats but said they would enforce the decision to keep them away from Gaza.
The al-Jazeera satellite channel reported by telephone from the Turkish ship leading the flotilla that Israeli navy forces fired at the ship and boarded it, wounding the captain. The Turkish NTV network also reported an Israeli takeover with gunfire, and at least two people were killed.
The al-Jazeera broadcast ended with a voice shouting in Hebrew, "Everybody shut up!"
A Turkish website showed video of pandemonium on board one of the ships, with activists in orange life jackets running around as some tried to help an activist apparently unconscious on the deck. The site also showed video of an Israeli helicopter flying overhead and Israeli warships nearby.
The reports came just after daybreak, with the flotilla still well away from the Gaza shore. Israel had declared it would not allow the ships to reach Gaza.
The head of the Gaza Hamas government, Ismail Haniyeh, condemned the "brutal" Israeli attack.
"We call on the Secretary-General of the U.N., Ban Ki-moon, to shoulder his responsibilities to protect the safety of the solidarity groups who were on board these ships and to secure their way to Gaza," Haniyeh told The Associated Press.
On Sunday, Huwaida Arraf, one of the organizers, said the six-ship flotilla began the journey from international waters off the coast of Cyprus on Sunday afternoon after two days of delays. She said they expected to reach Gaza, about 250 miles (400 kilometers) away, on Monday afternoon, and that two more ships would follow in "a second wave."
The flotilla was "fully prepared for the different scenarios" that might arise, and organizers were hopeful that Israeli authorities would "do what's right" and not stop the convoy, she said.
"We fully intend to go to Gaza regardless of any intimidation or threats of violence against us," she said. "They are going to have to forcefully stop us."
After nightfall Sunday, three Israeli navy missile boats left their base in Haifa, steaming out to sea to confront the activists' ships.
Two hours later, Israel Radio broadcast a recording of one of the missile boats warning the flotilla not to approach Gaza.
"If you ignore this order and enter the blockaded area, the Israeli navy will be forced to take all the necessary measures in order to enforce this blockade," the radio message continued.
The al-Jazeera satellite channel reported that the ships changed course to try to avoid a nighttime confrontation, preferring a daylight showdown for better publicity.
The flotilla, which includes three cargo ships and three passenger ships, is trying to draw attention to Israel's three-year blockade of the Gaza Strip. The boats are carrying items that Israel bars from reaching Gaza, like cement and other building materials. The activists said they also were carrying hundreds of electric-powered wheelchairs, prefabricated homes and water purifiers.
Israeli Foreign Ministry spokesman Yigal Palmor said that after a security check, permitted humanitarian aid confiscated from the boats will be transferred to Gaza through authorized channels. However, Israel would not transfer items it has banned from Gaza under its blockade rules. Palmor said that for example, cement would be allowed only if it is tied to a specific project.
This is the ninth time that the Free Gaza movement has tried to ship in humanitarian aid to Gaza since August 2008.
Israel has let ships through five times, but has blocked them from entering Gaza waters since a three-week military offensive against Gaza's Hamas rulers in January 2009. The flotilla bound for Gaza is the largest to date.
Some 700 pro-Palestinian activists are on the boats, including 1976 Nobel Peace Prize laureate Mairead Corrigan Maguire of Northern Ireland, European legislators and an elderly Holocaust survivor.