the military phase of operations was terminated Process_end in april 2002 , and the coordination of the field operations were given Giving first to the federal security service and then to the mvd in the summer of 2003 .

after the murder Killing of two female hostages two-and-a-half days in , spetsnaz operators from federal security service ( fsb ) alpha and vympel , supported Supporting by a russian ministry of internal affairs ( mvd ) unk unit , pumped Self_motion an undisclosed chemical agent into the building 's ventilation system and began Process_start the rescue operation .