Dutch police are traveling to the scene of the Malaysian plane disaster in eastern Ukraine to secure the site, which investigators complain has already been compromised.

Rebel interference and security concerns have limited investigators' access to the site. International observers say there are still remains at the scene. A dozen Dutch policemen in armored SUVs set off for the site late Sunday morning.

Malaysian Airlines Flight 17 was shot down over a part of eastern Ukraine controlled by pro-Russian separatists last week, killing nearly 300 people on board. U.S. and Ukrainian officials say it was shot down by a missile from rebel territory, most likely by mistake.