At least 44 people, including Russia's top nuclear design scientists were killed on Tuesday when a Tu-134 passenger plane crash landed on a highway in heavy fog and burst into flames in northern republic of Karelia.
Around 120 people had been evacuated from the burning centre, rescuers said on Sunday.
The international post office in Moscow was evacuated after a high level of radiation was detected from a package
Supporters will be offered free water and paper caps and fans to help them keep cool, officials said.