U.S. officials in Russia have received information regarding threats of physical violence against performers and spectators at a pair of Madonna concerts this week, and are urging U.S. citizens to "remain vigilant."

The U.S. Embassy in Moscow and the U.S. Consulate General in St. Petersburg issued the warning on Tuesday for U.S. citizens in Russia that are planning to attend Madonna's concerts in Moscow (Aug. 7) or in St. Petersburg (Aug. 9). The information has been shared with Russian authorities, who have indicated they will add increased security to the events.

"While we expect that enhanced security measures will be put in place at both concerts, U.S. citizens are reminded to remain vigilant regarding their personal security, and to be aware of their surroundings at all times, especially in crowded areas," the message reads.

It's unclear whether Madonna, on tour since late May, has been directly threatened or if U.S. officials have contacted her camp. A request for comment from LiveNation was not returned by press time.

Click here to read the issued statement.

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