Syria's al-Nusra Front announces 'no-fly zone'

Al-Nusra Front (Jubhat al-Nusra), a group of fighters in Syria, has declared what it called a 'no-fly zone' over Aleppo, stating that the Syrian regime's army is using commercial flights to transport military gear and troops.

In a video sent to Al Jazeera, the group warned any civilians of boarding commercial flights to avoid being used as human shields.

They also confirmed laying siege on the al-Nairab airfield, adding that any plane over the skies of Aleppo will be targeted.

Al-Nusra told Al Jazeera they will use anti-aircraft guns of 23mm and 57mm caliber to down planes.

The US, earlier this month, has put al-Nusra on its list of terrorist organisations.