On 6 September 2004, the names and identities of seven of the assailants became known, after forensic work over the weekend and interviews with surviving hostages and a captured assailant. The forensic tests also established that 21 of the hostage-takers took heroin, methamphetamine as well as morphine in a normally lethal amount; the investigation cited the use of drugs as a reason for the militants' ability to continue fighting despite being badly wounded and presumably in great pain. In November 2004, Russian officials announced that 27 of the 32 hostage-takers had been identified. However, in September 2005, the lead prosecutor against Nur-Pashi Kulayev stated that only 22 of the 32 bodies of the captors had been identified, leading to further confusion over which identities have been confirmed.