Militants Use Chemical Weapons in Syria's Aleppo

"Terrorists have used a weapon causing asphyxia and damaging the nervous system. Five people have died from suffocation," a militia member said.

Syria has been mired in civil war since 2011, with government forces loyal to President Bashar Assad fighting numerous opposition factions and extremist groups.

Aleppo is partially controlled by Jabhat Fatah al Sham (previously known as the al-Nusra Front), an terrorist group outlawed in Russia and other countries along with Daesh.