KUALA LUMPUR, Malaysia – China demanded Malaysia turn over the satellite data used to conclude that a Malaysia Airlines jetliner had crashed in the southern Indian Ocean as gale-force winds and heavy rain Tuesday halted efforts to search for any remains of the plane.
The suspension in the search comes after a somber announcement late Monday by Prime Minister Najib Razak saying the jet had gone down in the sea with no survivor. But it also left unanswered many troubling questions about why Flight 370, en route to Beijing on March 8 when it disappeared, was so far off-course.
It also unleashed a storm of sorrow and anger among the families of the plane's 239 passengers and crew — two-thirds of them Chinese. Family members of the missing passengers have complained bitterly about a lack of reliable information and some say they are not being told the whole truth.
Nearly 100 relatives and their supporters marched on the Malaysian Embassy in Beijing, where they threw plastic water bottles, tried to rush the gate and chanted, "Liars!"
Many were wearing white T-shirts that read "Let's pray for MH370" as they held banners and shouted, "Tell the truth! Return our relatives!"
There was a heavy police presence at the embassy and there was a brief scuffle between police and a group of relatives who tried to approach journalists.
Deputy Foreign Minister Xie Hangsheng told Malaysia's ambassador to Beijing that China wanted to know exactly what led Najib to announce that the plane had been lost, a statement on the ministry's website said.
Malaysia Airlines Chairman Mohammed Nor Mohammed Yusof said at a news conference Tuesday that it may take time for further answers to come clear.
"This has been an unprecedented event requiring an unprecedented response," he said. "The investigation still underway may yet prove to be even longer and more complex than it has been since March 8th."
He added that even though no wreckage of the Boeing 777 has been found, there was no doubt it had crashed.
"This by the evidence given to us, and by rational deduction, we could only arrive at that conclusion: That is, for Malaysia Airlines to declare that it has lost its plane, and by extension, the people in the plane," he said.
The airline's chief executive, Ahmad Jauhari Yahya, said although there have been an increasing number of apparent leads, there has been no definitive identification of any debris. For several days now, search planes have been scouring seas 2,500 kilometers (1,550 miles) southwest of Perth, Australia, and have spotted several floating objects, but none have been retrieved or proven to be from the missing plane.
"It is impossible to predict how long this will take. But after 17 days, the announcement made last night and shared with the families is the reality which we must now accept," he said.
In Monday night's announcement, Najib said that an unparalleled study of the jet's last-known signals to a satellite showed that the missing plane veered "to a remote location, far from any possible landing sites."
The conclusions were based on a more-thorough analysis of the brief signals the plane sent every hour to a satellite belonging to Inmarsat, a British company, even after other communication systems on the jetliner shut down for unknown reasons.
But Najib's announcement did nothing to answer why the plane disappeared shortly after takeoff. More specifically, it sheds no light on investigators' questions about possible mechanical or electrical failure, hijacking, sabotage, terrorism or issues related to the mental health of the pilots or someone else on board.
And it is not clear if the latest information can provide an exact location or just a rough estimate of where the jet crashed into the sea.
High waves, strong winds and low-hanging clouds forced the multinational search to be suspended for 24 hours Tuesday, the Australian Maritime Safety Authority said in a statement.
Australian Prime Minister Tony Abbott said he had spoken to Najib to offer help with the ongoing search and investigation.
"What up until now has been a search, moves into a recovery and investigation phase," Abbott said. "I have offered Malaysia, as the country legally responsible for this, every assistance and cooperation from Australia."
In Perth, Vice Chief of the Defense Force Air Marshal Mark Binskin outlined how difficult that made the hunt.
"We're not searching for a needle in a haystack — we're still trying to define where the haystack is," he said.
Several countries had already been moving specialized equipment into the area to prepare for a possible search for the plane and its black boxes, the common name for the cockpit voice and data recorders — needed to help determine what happened to the jetliner.
There is a race against the clock to find any trace of the plane that could lead them to the location of the black boxes, whose battery-powered "pinger" could stop sending signals within two weeks. The batteries are designed to last at least a month and can last longer.
An Australian navy support vessel, the Ocean Shield, equipped with acoustic detection equipment, was expected to arrive in several days in the search zone. And the U.S. Pacific Command said it was sending a black box locator to the region in case a debris field is located.
The U.S. Navy has also sent an unmanned underwater vehicle to Perth that could be used if debris is located, said Rear Adm. John Kirby, a Pentagon spokesman. The Bluefin-21, expected to arrive in Perth on Wednesday, has side-scanning sonar and what is called a "multi-beam echo sounder" that can be used to take a closer look at objects under water, he added. It can operate at a depth of 4,500 meters (14,700 feet).
The search for the wreckage and the plane's recorders could take years because the ocean can extend to up to 7,000 meters (23,000 feet) deep in that part of the ocean. It took two years to find the black box from an Air France jet that went down in the Atlantic Ocean on a flight from Rio de Janeiro to Paris in 2009, and searchers knew within days where the crash site was.
"We've got to get lucky," said John Goglia, a former member of the U.S. National Transportation Safety Board. "It's a race to get to the area in time to catch the black box pinger while it's still working."
Associated Press writers Todd Pitman in Kuala Lumpur; Christopher Bodeen, Ian Mader, Aritz Parra and Didi Tang in Beijing; Cassandra Vinograd in London; Darlene Superville in Washington; and Kristen Gelineau in Sydney and Rod McGuirk in Canberra, Australia, contributed to this report.