On October 23, 2002, over 40 terrorists took more than 700 hostages prisoner at a Moscow theater. The hostage-takers demanded an end to the Russian presence in Chechnya, and threatened to execute the hostages if their conditions were not met. The siege ended violently on October 26, when Russian troops were forced to storm the building after the detonation of some explosive devices inside. Many casualties resulted from the fact that unconscious victims' airways were blocked and sub-optimal care was given during the rescue. In particular, the failure of Russian authorities to equip their troops with opioid antidotes and their efforts to conceal the identity of the gas for days afterward hindered efforts to save the lives of the stricken hostages.