The Kremlin was disappointed at U.S. President Barack Obama's cancellation of next month's scheduled summit with President Vladimir Putin, a presidential aide said Wednesday.

The cancellation, announced earlier in the day by White House spokesman Jay Carney, showed the United States was not prepared for equal relations, Yuri Ushakov told reporters.

Carney called "Russia's disappointing decision" to grant fugitive U.S. intelligence whistleblower Edward Snowden temporary asylum "also a factor" Washington considered in assessing the current state of bilateral relations with Moscow.

"This problem testifies to the remaining unpreparedness of the United States to build an equal relationship," the Interfax news agency quoted Ushakov as saying.

He said Russia was not at fault in dealing with the Snowden incident, and Obama "was and remains invited to make a visit to Russia."