Malaysian authorities who tested the sample of an earlier oil slick near Vietnam said it did not belong to the aircraft.
Meanwhile, a Malaysian airline spokesman here said there is still no trace of the aircraft 88 hours after its disappearance.
Rescue efforts are ongoing, covering eastern and western parts of peninsular Malaysia, but there is “no finding of the aircraft,” an airline spokesman told the media here today.
A total of 42 vessels and 35 aircraft from various countries have joined the rescue mission.
China, which is under pressure as majority of the passengers are its citizens, has stepped up its efforts by sending nine ships and besides number of aircraft for the search operations, Foreign Ministry spokesman, Qin Gang told media here.
It also sent a joint working team to Kuala Lumpur to coordinate the search operations with the Malaysian officials.
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