Censor.NET reports about it, citing the Sydney Morning Herald.
Relatives of victims in the Netherlands dialled the mobile phone numbers of crash victims and said the phones were answered by people with 'eastern European-sounding voices', the Netherlands' De Telegraaf reported.
The relatives were shocked when they heard the voices, the paper said.
There have been several reports of looting at the crash site, which spreads over more than 50 square kilometres and has not been secured because it is in separatist-controlled territory.
Journalists who examined the scene said there was a notable lack of items such as phones, wallets, cameras and jewellery.
Some footage shot at the scene appears to show one militant taking a ring and putting it in a paper bag.