(QHA) -

White House says President Barack Obama spoke Tuesday with his Russian counterpart Vladimir Putin on how to ensure a safe and secure Sochi Olympics, VOA reports.

The top-level conversation came a day after the Pentagon said it offered Moscow air and naval assets to help secure the resort city area. A White House statement says Washington is offering its "full assistance” on Olympic security.
Russian officials have blamed the so-called "black widows" of slain insurgents for suicide attacks in the country.

Andrew Kuchins, the director of the Russia and Eurasia Program at the Center for Strategic and International Studies in Washington noted that security in Sochi is not the only Russian security concern.

"You don't necessarily have to hit Sochi to spoil the games, he said. A series of Volgograd attacks would terrorize the whole of Russia and spoil the games and that will be a great tragedy."

On Sunday, an Islamic militant group from Dagestan posted a video online claiming responsibility for last month's deadly suicide bombings in Volgograd, which killed 34 people. The two men in the video also threaten attacks at the Olympics. It is unclear when the video was made.
Russian President Vladimir Putin said in comments broadcast Sunday that his country will do "whatever it takes" to ensure security at the Olympics.