Moscow (CNN) -- Outside the Dutch Embassy in Moscow, people have left flowers and cuddly toys at a makeshift memorial for the lives lost in a conflict-scarred corner of eastern Ukraine. Malaysia Airlines Flight 17 fell from the sky in Donetsk on Thursday, killing all aboard. Of the 298 people killed, 193 -- nearly two-thirds -- were Dutch citizens. The United States accuses Moscow of supporting the pro-Russian rebels that it suspects shot down the aircraft. Russia denies involvement, with Russian President Vladimir Putin saying Ukraine's military operation against the rebels is to blame for the tragedy. He has called for a "thorough and objective" investigation.
@highlight
Nearly two-thirds of those who died in the Malaysia Airlines crash in Ukraine were Dutch
@highlight
In Moscow, people have been leaving flowers and toys outside the Dutch Embassy
@highlight
Many of the messages include the phrase "forgive me," CNN's Diana Magnay says
@highlight
One Muscovite told her that Russia's connections with rebels meant it was involved
"I think there's lot of proof that we're in closer relations and connections with the separatists in @placeholder.