Malaysia says jet crashed in sea; bad weather halts search

(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, Malaysian Prime Minister Najib Razak said on Monday that Malaysia Airlines Flight MH370, which vanished more than two weeks ago while flying to Beijing from Kuala Lumpur, had crashed thousands of miles away in the southern Indian Ocean.

Recovery of wreckage of the Boeing 777 could unlock clues about why the plane had diverted so far off course. Theories range from a hijacking to sabotage or a possible suicide by one of the pilots, but investigators have not ruled out technical problems.

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."