"We want to get to the bottom of it. It is important for to have a thorough and complete transparent investigation of what actually happened. And to do that we need the cooperation of all the international bodies. And I've been in touch with (US Defence) Secretary Hagel last night. I've spoken to (Foreign Secretary) Philip Hammond from the United Kingdom. The Chinese leaders have been on the line with me."
"And we've been told this morning by our prime minister that he has been in touch with (Russian) President Putin, the Ukrainian leadership. All that has been in place. But we do not have a position until all the facts have been verified, whether the plane was really brought down, how it was brought down, who brought it down."
6. Media surrounding Hishammuddin Hussein minister as he walks away
Malaysia's defence minister on Saturday said leaders around the world backed his country's call for a "thorough and complete transparent" investigation into the cause of the crash of Flight 17 in Ukraine.
Talking to reporters, Hishammuddin Hussein said he had spoken to his counterpart from the US, Britain's foreign secretary and Chinese leaders, as all international bodies would need to cooperate in order to "get to the bottom" of what happened.
Until that time, the minister said Malaysia could not say for certain whether the plane had been brought down by a missile fired by pro-Russian separatists.
US President Barack Obama on Friday said the US believed the Malaysia Airlines plane was felled by a surface-to-air missile launched from an area near the Ukraine-Russia border that is controlled by Kremlin-backed separatists.
Even as he cautioned that the exact circumstances were still being determined, Obama turned his sights on Moscow, saying the insurgents would not be capable of carrying out such an attack without its support.
All 298 people aboard the Malaysian plane were killed in Thursday's incident.
The passengers, including scores of children, came from a dozen countries, spreading the impact of the Ukraine crisis around the globe.