Russia had closed checkpoints on parts of the border with China and Mongolia until June 4 , Itar-Tass news agency said .
Russia had closed checkpoints on parts of the border with China and Mongolia until June 4 , Itar-Tass news agency said .
Russia has closed dozens of checkpoints on the border with China and Mongolia , which has also reported SARS cases , until June 4 , Itar-Tass news agency said .