Following the Omsk 11, several other cities overtook a series of false calls about the terrorist attacks. Unknown "mined" buildings in Ufa, Chelyabinsk, Yekaterinburg, Stavoropol, Novosibirsk and Bryansk. The next day, telephone terrorists turned up in Petropavlovsk-Kamchatsky, Yakutsk and Khabarovsk. Calls about bombs laid down in buildings almost simultaneously arrived at regional departments of the Ministry of Internal Affairs. According to some reports, calls came from abroad. The doctor of military sciences, president of the Academy of Geopolitical Problems Konstantin Sivkov comments.