The Foreign Ministry of Ukraine has expressed its indignation at the U.S. rock group Bloodhound Gang's onstage prank of desecrating the Russian national flag.

"The Ukrainian law enforcement services will deal with this incident and take appropriate measures," the Ukrainian Foreign Ministry told Interfax-Ukraine.

Concerning the incidents at clubs in Odesa and Kyiv, "there is every moral and ethical reason to consider the American rock group's stunt unacceptable," the Foreign Ministry said.

"The desecration of national symbols cannot be justified by any onstage pranks," it said.

Ukrainian media reported earlier that the scandalous American rock group started its tour of the Commonwealth of Independent States from Ukraine.

"A rock musician urinated on the stage, targeting the blue and yellow Ukrainian national flag" during a concert in Kyiv on July 30, but the audience was very much amused, media reports said.

The next day, bassist Jared Hasselhoff, 41, pretended to use the Russian flag as toilet paper at the Ibiza club in Odesa. He threw the desecrated flag into the crowd, where it was caught by a fan.

The incidents were videotaped and posted on the Internet, after which of the rock group's concert in southern Russia was cancelled, even though the rock musicians had been paid for it. They were pelted with tomatoes and eggs before their departure from the Anapa airport, and they were also attacked by Cossacks, one of whom wanted to strangle the bassist with an American flag. The flag was torn into pieces in front of the musicians after police intervened.

Although the rock group apologized, it had to leave Russia.