A team of international observers say pro-Russian rebels in Ukraine have limited their access to the wreckage of a Malaysia Airlines plane.
An OSCE spokesman said access to the site had been controlled by armed men, with one firing shots into the air.
It is believed flight MH17 crashed after being hit by a surface-to-air missile fired from a rebel-held area in east Ukraine.
The plane crashed on Thursday, killing all 298 people on board.
The Boeing 777 was flying from Amsterdam to Kuala Lumpur. It fell between Krasni Luch in Luhansk region and Shakhtarsk in the neighbouring region of Donetsk.