"If it turns out that it is truly MH370, then we will accept that fate," said Selamat Bin Omar, the father of a Malaysian passenger. The jet carried mostly Chinese and Malaysian nationals.
But he cautioned that relatives still "do not yet know for sure whether this is indeed MH370 or something else. Therefore, we are still waiting for further notice from the Australian government."
Malaysian officials met with the relatives Thursday night in a hotel near Kuala Lumpur, but journalists were kept away. After the meeting, groups of people left looking distraught.
Hamid Amran, who had a child on Flight 370, said questions asked at the meeting made it "apparent that Malaysia's military is incapable of protecting its own airspace."
He believes "that my child and all the other passengers are still alive. I will not give up hope."
Malaysian Airlines CEO Ahmad Jauhari Yahya said the relatives in Kuala Lumpur were being given updates by high-level officials "two or three times a day."
"We do take care of the next of kin," he said, adding that if the debris is located "close to Australia, we will obviously make arrangements to fly the next of kin there."
DigitalGlobe, a Longmont, Colo.-based company, said it provided the images to Australian officials. The Australian Maritime Safety Authority released two images of the whitish objects. They were taken March 16, but Australian Air Commodore John McGarry said it took time to analyze them.
"The task of analyzing imagery is quite difficult, it requires drawing down frames and going through frame by frame," he said.
The hunt has encountered other false leads. Oil slicks that were seen did not contain jet fuel. A yellow object thought to be from the plane turned out to be sea trash. Chinese satellite images showed possible debris, but nothing was found.
Malaysian authorities have not ruled out any possible explanation for what happened to the jet, but have said the evidence so far suggests it was deliberately turned back across Malaysia to the Strait of Malacca, with its communications systems disabled. They are unsure what happened next.
Police are considering the possibility of hijacking, sabotage, terrorism or issues related to the mental health of the pilots or anyone else on board.
Gelineau reported from Sydney, Australia. Associated Press writers Rod McGuirk and Todd Pitman in Kuala Lumpur; Nick Perry in Wellington, New Zealand; and Julia Gronnevet in Oslo, Norway, contributed to this report.