"Russia has consistently advocated and continues to advocate for very close cooperation in the investigation. Russia has repeatedly said that it had provided all the necessary data, and regrets the fact that a number of parties, including those mentioned, are not following this example," Peskov told reporters.
The spokesman was responding to a request for comments after Dutch media reported that family members of the MH17 victims appealed to the EU foreign policy chief for assistance in retrieving missing radar and satellite images of the flight. The relatives reportedly allege that Washington, Kiev and Moscow have thus far failed to share "all the relevant information" in connection to the crash.
Dutch investigators published a report in October 2015 claiming that the Malaysia Airlines aircraft appeared to have been downed using a Russia-produced Buk surface-to-air missile system. The report did not identify the exact location from where the missile was fired.
The Dutch Public Prosecution Service's (OM) preliminary investigation report into the disaster is expected on September 28. Malaysian Prime Minister Najib Razak said this month he planned to call a five-country Joint Investigation Team (JIT) – comprising Australia, Belgium, Netherlands, Malaysia and Ukraine – after the report's publication to determine a plan of action to bring the perpetrators to justice.