A probe into the July 19 terrorist attack in Chechnya's Znamenskoye village has produced evidence suggesting that the criminal group led by Chechen warlord Shamil Basayev was involved in the attack. "Cartridge cases discovered at the scene and found after the Basayev guerillas' attack on Grozny in August, 2004, are identical," Russian Deputy Prosecutor General Nikolai Shepel told Interfax on Sunday. Shepel made this statement in remarks about media reports saying that Basayev has claimed responsibility for the blast in Znamenskoye which left 14 people dead, most of them policemen. Shepel also said that Basayev and another Chechen guerilla leader Doku Umarov's involvement in the terrorist attack has figured in the probe as the main theory. "Intelligence suggests that Basayev's group is the most likely organizer of the attack. But northern Chechnya is controlled by Umarov, so his involvement in the terror attack is also being checked," Shepel said. "If Basayev's complicity is proved, one more episode will be added to the criminal charges brought against him," he said. Shepel said that among the suspects already detained, is the owner of the motor vehicle blown up in Znamenskoye.