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(Adds passenger families' statement; Australia deputy PM comment)
* Malaysia PM says MH370 crashed in southern Indian Ocean
* New satellite analysis confirms last location far from land
* Bad weather forces suspension of search - AMSA
* No hope of survivors; relatives distraught
* China demands Kuala Lumpur share all evidence
By Lincoln Feast and Niluksi Koswanage
SYDNEY/KUALA LUMPUR, March 25 (Reuters) - Bad weather and rough seas on Tuesday forced the suspension of the search for any wreckage of a missing Malaysian jetliner that officials are now sure crashed in the remote Indian Ocean with the loss of all 239 people on board.
Citing groundbreaking satellite-data analysis by British firm Inmarsat
Recovery of wreckage of the Boeing
An international air and sea search in the area on Monday spotted several floating objects that might be parts of the plane and an Australian navy ship was close to finding possible debris, Australian Prime Minister Tony Abbott said.
But the Australian Maritime Safety Authority (AMSA) said gale-force winds, heavy rain and low cloud meant planes could not fly safely to the zone on Tuesday, and waves of 6 metres (20ft) or more forced the navy ship from the area.
"AMSA has consulted with the Bureau of Meteorology and weather conditions are expected to improve in the search area in the evening and over the next few days. Search operations are expected to resume tomorrow, if weather conditions permit," AMSA said in a statement.
The search site is far from commercial flight paths about 2,500 km (1,550 miles) southwest of Perth, a region of deep, frigid seas known as the Roaring 40s where storm-force winds and huge waves are commonplace.
"This is a remote location, far from any possible landing sites," Malaysia's Najib said. "It is therefore, with deep sadness and regret, that I must inform you that, according to this new data, Flight MH370 ended in the southern Indian Ocean."
SMS TEXT
Some relatives of those on board first received the news that the search for survivors was over in a Malaysia Airlines SMS message which said: "We have to assume beyond all reasonable doubt that MH370 has been lost and none of those on board survived."
There were hysterical scenes at the Beijing hotel where many of the relatives of those on board were staying. Most of the passengers on the flight, from Kuala Lumpur to Beijing, were Chinese.
A group reportedly representing families issued a statement describing the Malaysian airline, government and military as "executioners" who constantly tried to delay and deceive them.
"We will take every possible means to pursue the unforgivable crimes and responsibility of all three," said the statement on the microblog of the Malaysia Airlines MH370 Family Committee.
Malaysia Airlines said in a statement that it would make arrangements to fly relatives to Australia once it had approval from the investigating authorities.
Abbott said he expected the families to travel to Australia soon. "They will find a welcoming country that is more than willing to embrace them in this difficult time," he told reporters.
COSTLY DIFFICULT INVESTIGATION
Najib's announcement opens the way for what will be one of the most costly and difficult air crash investigations ever. Normally, an official investigation can only begin once a crash site has been identified.
That would give Malaysia power to coordinate and sift evidence. Malaysia has faced heavy criticism over the progress of the search and its informal investigation, especially from China which had more than 150 citizens on board the plane.
Chinese Deputy Foreign Minister Xie Hangsheng immediately demanded Malaysia hand over all relevant satellite-data analysis showing how Malaysia had reached its conclusion about the fate of the jet.
Australia's Deputy Prime Minister Warren Truss said the Malaysian statement moved the search to a new phase.
"It moves it to a stage where we are now investigating an accident, a loss of an aircraft and some new decisions will have to be taken now about the direction of future operations," Truss told reporters.
"Malaysia needs to take control under the Chicago convention of those investigations."
The United States said it was sending an undersea Navy drone to Australia, in addition to a high-tech black box detector, to help in the search.
The so-called black boxes - the cockpit voice recorder and flight data recorder - record what happens during flight. Black boxes carry locator beacons but they fade out after 30 days.
Flight MH370 vanished from civilian radar screens less than an hour after taking off on March 8. No confirmed debris from the plane has been found since.
Investigators believe someone on the flight may have shut off the plane's communications systems. Partial military radar tracking showed it turning west and re-crossing the Malay Peninsula, apparently under the control of a skilled pilot.
Najib said Inmarsat had been performing further calculations on data gleaned from faint pings picked up by satellite that initially only narrowed the search area to two massive arcs.
The Inmarsat analysis had narrowed the search area "but it's still a big area that they have to search", said Stephen Wood, CEO of All Source Analysis, a satellite analytic firm.
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TAKE A LOOK - Stories on missing MH370
Inmarsat probed MH370's pings to plot route
INSIGHT-Planning may hold key to lost plane
Scrutiny of pilots reveals picture of normality
Calls to put black box data in the "cloud"
ANALYSIS-China's robust response
Malaysia failing credibility test
INTERVIEW-Hunt for black-box alternatives
GRAPHICS
- Interactive graphic on MH370
- Possible last location
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(Additional reporting by Ben Blanchard, Megha Rajagopalan and Joseph Campbell in Beijing, Stuart Grudgings, Michael Martina, Siva Govindasamy and A. Ananthalakshmi in Kuala Lumpur; Phil Stewart in Washington; Jane Wardell in Sydney and Matt Siegel in Perth; Editing by Mark Bendeich and Alex Richardson)
((jane.wardell@thomsonreuters.com)(+61 2 9373 1817)(Reuters Messaging: jane.wardell.thomsonreuters.com@reuters.net))
Keywords: MALAYSIA AIRLINES/ (WRAPUP 2, TV, PICTURES, GRAPHI