THE HAGUE, Netherlands (AP) -- Rescuers say four crew members have died and seven are still missing in the icy waters of the North Sea, after a cargo ship collided with another vessel and sank off the Dutch coast.
Coast Guard spokesman Marcel Oldenburger says four people were plucked dead from the sea and the search is continuing for those who are missing.
Thirteen sailors were rescued alive after the collision Wednesday night.
THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.
A cargo ship sank Wednesday night after colliding with another vessel on the North Sea. Rescuers in helicopters and ships plucked 13 crew members from life rafts, but 11 others remained missing.
The 148-meter (485-foot) Baltic Ace collided with the 134-meter (440-foot) container ship Corvus J near busy shipping lanes some 65 kilometers (40 miles) off the coast of the southern Netherlands. The Baltic Ace, carrying a cargo of cars, had a crew of 24, some of whom may be in the icy water.
"We have found life rafts, and the people in them are being picked up by helicopters," coast guard spokesman Peter Verburg said.
By around 10 p.m. (2100 GMT) 11 crew members had been rescued by helicopters and two more by ships, the coast guard said in a statement. Rescuers were using infrared cameras to hunt for more survivors.
"We still hope to find them," Kees Brinkman, a spokesman for rescuers, told Dutch television nearly four hours after the collision. But, he added, "their chances of survival are shrinking" if they are in the water.
In a statement, the Dutch Defense Ministry said two navy patrol ships were aiding the search. "Helicopters are trying, in (strong wind) and high waves to bring the people to safety," the ministry said.
Verburg said the 12-man crew of the Corvus J was still on board the ship, which was helping in the rescue operation. Details of its cargo were not immediately available. "It is badly damaged, but not in danger of sinking," Verburg said of the Corvus J.
The coast guard spokesman said the cause of the collision was not known. "At the moment we are solely focused on getting the people to safety," he said.Four of the survivors were being flown to a hospital in Rotterdam and seven to an airbase in Belgium.
The Baltic Ace was heading from the Belgian port of Zeebrugge to Kotka in Finland and the Corvus J was on its way from Grangemouth in Scotland to Antwerp, Belgium.