In 2004, Libya acceded to the Chemical Weapons Convention, and declared 24.7 metric tonnes of mustard gas, 1,390 metric tonnes of chemical precursors for making sarin, as well as 3,563 unloaded chemical weapon munitions (aerial bombs). The OPCW set January 2014 as the deadline for the full destruction of Libya's chemical weapons. Libya began destroying its chemical stockpiles and munitions later in 2004, but it missed deadlines for converting one chemical weapons production facility to peaceful use and for destroying its stockpile of mustard agent. In October 2014, Libya asked for foreign assistance to transport its 850 tonne stockpile of precursor chemicals for making nerve gas out of Libya for destruction. In February 2015, Libyan military sources told media that unidentified armed men had captured large amounts of Libya’s chemical weapons, including mustard gas and sarin. Destruction of Libya's chemical weapon precursors was completed in November 2017.