Shahidka (—Russian feminine gender derivation from shahid), sometimes called "Black Widow" or Chyornyye Vdovy in Russian, is a term for Islamist Chechen female suicide bombers, willing to be a martyr in the name of Islamist Jihad or holy war. They became known at the Moscow theater hostage crisis of October 2002. The commander Shamil Basayev referred to the shahidkas as a part of force of his suicide bombers called the Riyad-us Saliheen Brigade of Martyrs. Basayev also stated that he himself trained at least fifty of black widows.