Russia's UK Ambassador Alexander Yakovenko said the world "must wait" for a day to learn more details about how flight MH17 was shot down.
"We don't have the (flight) recorders," he said as he rejected claims separatists in eastern Ukraine were responsible for downing the passenger plane.
"We want to see other evidence (from the US and UK)," Mr Yakovenko added. "As soon as we get this, then we'll have a full picture."
The mother of the three Australian children killed on flight MH17 told a memorial service her "arms would always be reaching for them."
A woman has apparently posted pictures of herself on social media with mascara looted from the Malaysian Airlines flight MH17 crash site.
A large section of plane wreckage and everyday carry-on items like chocolates remain scattered among the wild flowers at the crash site.