The Kremlin voiced disappointment over the cancellation of the Moscow summit, but said its invitation to Mr. Obama to visit Russia still stands.

“We are disappointed,” said President Vladimir Putin’s foreign policy adviser Yuri Ushakov, adding that the decision was clearly linked to the situation with Mr. Snowden.

“This situation shows that the U.S. is still not ready to build relations with Russia on equal footing,” Mr. Ushakov told reporters on Wednesday.

“For many years, the Americans have avoided signing an extradition treaty,” he said. “And they have invariably responded negatively to our requests for extradition of people who committed crimes on the territory of Russia, citing the absence of such agreement.”

Despite that, the invitation to the U.S. President to visit Moscow stands, and Russia is “ready to continue working with our American partners on all the key issues of the bilateral and multilateral agenda,” Mr. Putin’s aide said.

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