Dutch investigators have arrived in Torez in Ukraine, where the remains of victims of the Malaysia Airlines plane crash are being stored.
The investigators are aiming to start work on identifying the 196 bodies kept there on a train.
All 298 people on flight MH17 died when it was reportedly hit by a missile.
The United States and other nations say there is growing evidence of Russian complicity in the downing of the plane last week as pressure is growing on pro-Russian rebels to allow experts to the crash site.
Dutch PM Mark Rutte, whose country lost 193 people, said on Monday that all political and economic options were on the table if access to the crash site near the village of Grabove remained unsatisfactory.
Ukrainian Prime Minister Arseniy Yatsenyuk proposed that the Netherlands will lead an international investigation
Russian President Vladimir Putin says it is essential to give international experts complete security so they can conduct an independent investigation