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The New York Times quotes Lai Xuan Thanh, the director of the Civil Aviation Administration of Vietnam, as saying there was one slick about 12 miles long.
An AN26 aircraft of the Vietnam Navy has discovered an oil slick about 20 kilometers in the search area, which is suspected of being a crashed Boeing aircraft -- we have announced that information to Singapore and Malaysia and we continue the search, Lai Xuan Thanh said.
He said he did not know whether the slick was closer to the Malaysian or Vietnam side of the entrance to the Gulf of Thailand. The last co-ordinates automatically transmitted by the aircraft were from near the midpoint between the two countries, when the plane appeared to be in stable flight at 35,000 feet.
Vietnamese authorities have reported the sighting of one, possibly two, oil slicks up to 12 miles long off the coast of the country which are consistent with a plane crash at sea. Malaysias prime minister, Razak, has said 15 aircraft and nine ships are involved in the search, with the area of the sea operation being enlarged
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Philippines military personnel are seen planning search and rescue operations for the missing plane at Antonio Bautista air base in Puerto Princesa.