More than a dozen Chinese diplomats met with Malaysian authorities in Kuala Lumpur on Wednesday as tension grew over the search.

"At present there's a lot of different information out there. It's very chaotic and very hard to verify," foreign ministry spokesman Qin Gang said in a regular press briefing. "We've said as long as there is a shred of hope, you can't give up."

The day before, Beijing pointedly pressed Malaysia to accelerate its investigation, which has been hampered by false leads on suspected debris and conflicting reports on radar tracking.

Vietnam on Wednesday suspended its search flights after conflicting reports from Malaysia that authorities had tracked the plane to the Strait of Malacca before it disappeared.

Gen. Rodzali Daud, Malaysia's air force chief, denied saying he had told local media that military radar facilities had tracked the plane there, saying they were still examining all possibilities. Vietnam later resumed normal search sweeps.

Malaysian authorities divided the search area into several sectors on either side of the country, as well as areas on land.

The challenge, said Lt. David Levy, a spokesman for the U.S. Navy's Seventh Fleet, isn't so much coordination as the sheer size of the area involved. The search grids are up to 20 miles by 120 miles, and ships and aircraft employ an exhaustive methodical pattern "like mowing your lawn" in their search for the plane, he said.

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