"When trying to arrest the terrorists, they offered armed resistance to the special forces of the FSB. Members of the Daesh* international terrorist organization were neutralized with response fire. There are no casualties among the officers of the FSB of Russia", the statement said.
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According to the articles of the criminal code on which a case has been initiated, the killed militants were preparing a terrorist attack.
The investigation is ongoing.
*Daesh (also known as ISIS/ISIL/IS) is a terrorist group banned in Russia