A Dutch military aircraft carrying remains of victims of the Malaysian plane which was downed over eastern Ukraine has departed for the Netherlands.
All 298 people - most of them Dutch citizens - aboard Malaysia Airlines Flight 17 were killed.
Wreckage of the Boeing 777 fell on territory controlled by pro-Russian separatists, and US officials say the plane was probably shot down by a missile, most likely by accident.
The military plane took off from the government-controlled city of Kharkiv. A second plane will follow.
The first bodies of the crash victims arrived in the Netherlands yesterday and were met there by Dutch King Willem-Alexander, Queen Maxima and hundreds of relatives.
Meanwhile, Australia's government has dispatched 50 police officers to London to prepare to join a proposed UN team to secure the crash site.
Australian prime minister Tony Abbott announced the dispatch of police officers and said foreign ministers of Australia and Netherlands are going to Kiev to seek an agreement to deploy an international security force.
Mr Abbott, who says he fears some remains will never be recovered unless security is tightened, has proposed a multinational force mounted by countries such as Australia, the Netherlands and Malaysia that lost citizens in the disaster.
"We are ready to deploy Australian police to Ukraine to help secure the site as part of an international team under United Nations authority," Mr Abbott said.
Senior US intelligence officials said on Tuesday that Russia was responsible for "creating the conditions" that led to the crash, but offered no evidence of direct Russian government involvement.
The officials said the plane was likely shot down by an SA-11 surface-to-air missile fired by Russian-backed separatists in eastern Ukraine.
They cited intercepts, satellite photos and social media postings by separatists, some of which have been authenticated by US experts.
Russia brushed off the accusations. Deputy defence minister Anatoly Antonov said in a video statement that if the US officials indeed had the proof the plane shot down by a missile launched from the rebel-held territory, "how come they have not been made public?"