'You can imagine how we feel'

Family and friends are comforting former New Zealand woman Danica Weeks after she received news that the Malaysian Airlines flight carrying her husband Paul had been confirmed lost in the Indian Ocean west of Perth.

Mrs Weeks is with the couple's two young sons in the family home in Perth's northern suburbs, about 15 minutes drive from RAAF Base Pearce where planes looking for any signs of Flight MH370 have been taking off and landing over the past week.

Mrs Weeks' mother, Kay Thompson, said her daughter was too distraught to talk about the official announcement that the plane had crashed.

"You can imagine how we feel," Ms Thompson said.

"We have been waiting for two weeks and I guess everyone hoped for something better than this. But that is the way it is and we are all dreadfully sad."

Ms Thompson had travelled from her Sunshine Coast home and she said her daughter's friends from New Zealand and Mandurah, south of Perth, were also helping her and helping look after the boys, Lincoln, 3, and 11-month-old Jack.

"We're a small family unit. They've only been living here for about two-and-a-half years," Ms Thompson said.

"I'm sorry, that's all I can say for now."

The Weeks had moved to Perth from Christchurch after the 2011 earthquakes.

Mr Weeks, a mechanical engineer, had boarded the Malaysian Airlines Boeing 777 on his way to start a new job in Mongolia.

He was one of two New Zealanders on the flight. The family of Ximin Wang, 50, of Auckland, have asked for privacy.

Earlier today, the hunt for flight 370 has been called off for the day due to bad weather.

In a statement the Australian Maritime Safety Authority (AMSA) said the search area was forecast to experience strong gale force winds of up to 80km/h, periods of heavy rain, and low cloud with a ceiling between 200 and 500 feet.

It said that could make for hazardous conditions for search crews.

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. 

Teams searching for wreckage from missing flight MH370 are expected to pinpoint objects spotted by an Australian crew, as new satellite analysis confirmed the Malaysia Airlines plane had plunged into the southern Indian Ocean.

Malaysian Prime Minister Najib Razak told a press conference in Kuala Lumpur late last night that new data showed the plane, carrying 239 people, had crashed into the ocean west of Perth after going missing more than two weeks ago.

"Based on new analysis we have concluded [the jet] flew along southern corridor and that its last position was in the middle of Indian Ocean west of Perth.

"This is a remote location far from any possible landing site.

"It is therefore with deep sadness and regret that I must inform that in accordance with this new data Flight MH370 ended in the southern Indian Ocean."

Mr Najib said he had been briefed by representatives from the UK Air Accident Investigation Branch (AAIB), which informed him that satellite data from the UK company Inmarsat, using techniques "never before used in an investigation of this sort", revealed the final position of the plane.

The International search effort was expected today to zero in on an area where two objects had been sighted by an Australian crew the day before.

Prime Minister Tony Abbott told parliament yesterday evening that a Royal Australian Air Force P3 Orion had located two objects, a grey or green circular object and an orange rectangular object.

The HMAS Success is in the area, about 2500km southwest of Perth, and attempting to recover the objects.

A US Navy P8 Poseidon, a second RAAF Orion and a Japanese Orion are also en route to try to find the items.

Malaysian authorities say the objects could be retrieved "by (Tuesday) morning at the latest''.

The most recent sightings have followed suspected plane debris being picked up by Australian, Chinese and French satellites.

Flight 370 vanished on March 8 just an hour into its journey from Kuala Lumpur to Beijing, carrying 239 people, including six Australians and two New Zealanders.

How relatives were told

Relatives of passengers and crew have been told of the "heartbreaking'' news that flight went down in southern Indian Ocean.

Moments before the Prime Minister's press conference, officials from Malaysia Airlines sent an SMS text message to the families of the passengers on board when the plane was lost which said: "We must now accept all evidence suggests the plane went down in the Southern Indian Ocean".

"Malaysia Airlines deeply regrets that we have to assume beyond any reasonable doubt that MH370 has been lost and that none of those on board survived," the message read.

"Malaysia Airlines has already spoken to the family of the passengers and crew to inform them of this development," Mr Najib said.

"For them the past few weeks have been heartbreaking. I know this news must be hard as well."

Bad weather to hamper search

Earlier, the Malaysia transport minister, Hishammuddin Hussein, said an Australian naval ship could locate possible debris within hours.

The Australian Maritime Safety Authority (Amsa) confirmed that the HMAS Success had made its way out to the remote search area some 2,500km from Perth, and that the objects were seen within the stretch of water being scoured today.

"HMAS Success is on scene and is attempting to locate and recover these objects," Australian Prime Minister Tony Abbott said in a statement to parliament.

However, New Zealand Air Force Air Commodore Mike Yardley said bad weather could significantly hamper those efforts.

The weather system approaching the search area will bring "significantly" bad weather, he told TV3's Firstline this morning.

"We've got a bad front coming through with north-west gales as I understand, so the sea state is going to rise and that means it'll be very difficult conditions today for our visual look-outs and also challenging for our radar," he said.

"I understand in fact that the weather might be so difficult the Australian authorities are now telling us that they don't think [HMAS] Success will now be in a position to collect any of this debris even if we find it."

So far, ships in the search effort have been unable to locate several "suspicious" objects spotted by satellites in grainy images or by fast-flying aircraft over a vast search area in the remote southern Indian Ocean.

Earlier yesterday spotters on a Chinese plane said they had seen two white, square-shaped objects in the southern Indian Ocean, at that stage the second possible sighting of plane debris made with the naked eye in the search for the missing Malaysia Airlines Boeing 777.

Spotters aboard that search plane reported the coordinates to a Chinese icebreaker ship, Xue Long, which was making its way to the area - as well as to the central Australian command centre.

In addition to the two larger floating objects, the searchers also reported seeing a range of smaller, white debris scattered over several square miles, according to China's Xinhua news agency.

The sightings were all made in the area identified in previous satellite images from Australia and China.

The developments came as the US prepared to send a specialised device that can locate black boxes into the region.

- additional reporting AAP

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