Although Malaysian officials said that Malaysia Airlines Flight 370 is lost and that none of the 239 people onboard have survived, they declined to give any details. China is now demanding that officials hand over the satellite data used to reach that determination.

Late Monday, Malaysian officials told family members that the flight “ended” in the Southern Indian Ocean. That still left countless questions about the fate of the Boeing 777, which had been missing since March 8. It was on its way from Kuala Lumpur to Beijing.

Two-thirds of the passengers onboard were Chinese. So, China is demanding that their officials get a look at the satellite dta Malaysia says proves the plane went down, reports CBS News.

Meanwhile, the search for the wreckage is centered in a remote location in the Southern Indian Ocean, far from any land. According to the DPA, the Australian Maritime Safety Authority said that it had to stop searching today due to poor weather. None of the objects - believed to be debris from the plane - spotted by satellites have been found.

Families of the lost passengers are now demanding answers, but officials haven’t been able to give any. What caused the plane to make a dramatic u-turn on its way to Beijing is still unknown.

“We do not know why. We do not know how. We do not how the terrible tragedy happened,” Malaysia Airlines CEO Ahmad Jauhari Yahya told reporters.