MOSCOW — Russian officials complained on Monday that the United States routinely disregards extradition requests by the Russian government, the latest in a series of public statements that seem aimed at laying the groundwork for granting asylum to Edward J. Snowden, the former intelligence contractor on the run from the American authorities.

In separate but apparently coordinated statements, officials from the Russian Interior Ministry and from the prosecutor general’s office complained that the United States had refused to extradite individuals sought by Russia as suspected terrorists or on serious criminal charges.

“The United States is repeatedly refusing Russia to extradite individuals, to hold them criminally liable, including those accused of committing serious or heinous crimes,” Sergei Gorlenko, the acting chief of the prosecutor general’s extradition office, told the Interfax news agency. “We have been denied the extradition of murderers, bandits and bribetakers.”

The Interior Ministry accused the United States of “double standards” in demanding Mr. Snowden’s return. The prosecutor general’s office said the United States had refused to extradite about 20 suspects over the past decade, citing the lack of an extradition treaty — the same reason senior Kremlin officials have given in saying they have no plan to repatriate Mr. Snowden.