BEIJING, CHINA - MARCH 24: A family member of a passenger from the missing Malaysia Airlines flight MH370 shows her emotion at Lido Hotel on March 24, 2014 in Beijing, China.

Missing Malaysian Flight Lost, Passengers Dead

Malaysia's Prime Minister Najib Razak announced in a press conference this morning that investigators believe Flight 370's last position was in the Indian Ocean west of Perth.

"According to this new data, Flight MH 370 ended in the Southern Indian Ocean," he said this morning. 

All 239 passengers and crew on board the plane are believed lost. 

Family members have been notified that their loved ones are thought to be dead. 

It is reported that family members received a text message from the airline earlier today that said "we deeply regret that we have to assume beyond any reasonable doubt that MH370 has been lost and that none of those on board have survived."  

"MH 370 flew along the southern corridor and that its last position was in the middle of the Indian Ocean west of Perth," he said. 

Dressed in a black suit, Najib announced the news "with deep sadness and regret" in a brief news conference today.

The Najib called this latest twist in the case "heartbreaking."   

Najib says analysis of satellite data that disclosed the plane's fate was unprecedented.

The flight vanished more than two weeks ago after take-off from Kuala Lumpur en route to Beijing. All 239 passengers and crew on board the flight are believed dead.  

Objects Found in Southern Indian Ocean Today 

After more than two weeks of searching, it was reported overnight that China had found "suspicious objects" in the southern Indian Ocean that may be from the missing Boeing 777. 

Not long after that, Malaysian authorities confirmed that an Australian plane had noticed two objects.  

"The prime minister received a call from the prime minister of Australia, who informed him that an Australian search aircraft had located two objects in the Australian search area -- one circular and one rectangular," Malaysia's transport minister said. 

The hope is that the objects can be reached and retrieved before the end of the day. 

"Two orange objects approximately one meter in length and one white color [object] were sighted by search aircraft, but remain unidentified and have not been complicity linked to MH 370," he said. 

More ships and aircraft from several countries are expected to arrive in the search area tomorrow. 

Flight 370 has been missing March 8th when it vanished from radar en route from Kuala Lumpur to Beijing with 239 people on board.  

Theory About Plane's Disappearance 

A top U.S. official says there's no overarching theory about a Malaysian airliner's disappearance.

"We need to get the facts, but we can't get ahead of the facts, and we do not know yet what happened to the plane, why it happened. We're working on it," 

Deputy national security adviser Tony Blinken told CNN's "State of the Union."

Searchers are still gathering information.

 "We've put every asset we have available to help the Malaysians try and get to the facts. So we have the FBI working on it, the NTSB, we have, as you know, a P-8 survey plan trying to find out what happened," Blinken said. 

Flight 370 vanished from radar nearly two weeks ago. Current search efforts are centered near Australia in the Indian Ocean.  

Disappearance Prompts New Safety Measures

The disappearance is prompting reviews of airline safety and tracking technology.

"Even if you have technology, if you have people who are participating it or not participating in it, you may be able to change the ability for that technology to deliver, you know, the information it needs to deliver," Republican Congressman Patrick Meehan of Pennsylvania told CNN's "State of the Union."

 He said governments and airlines must upgrade safety measures.

"Ninety day batteries, the potential that there would be streaming, targeted to be normal until there is an anomaly, at which point in time, as soon as the plane  go off the charted course, it would give you significantly more information," he said.