Al Jazeera gained access to an extensive network of tunnels in the Sheikh Maqsoud area of Aleppo.
The Kurdish-led Syrian Democratic Forces (SDF) have agreed to withdraw from Aleppo after days of deadly violence.
Aleppo governor says last SDF fighters have left the city after the Syrian army took control of the Sheikh Maqsoud area.
US military says the strikes are in response to an ISIL ambush that killed three American personnel in Palmyra.
Fighting winds down after earlier escalation, which saw governorate building hit by drone allegedly launched by SDF.
Al Jazeera’s Resul Serdar Atas recounts scenes from Aleppo amid escalating clashes between the Syrian army and the SDF.
The Syrian army is combing through the Sheikh Maqsoud neighbourhood of Aleppo as fighting intensifies.
As a ceasefire between the Syrian army and the Kurdish-led SDF collapses, the UN is urging the protection of civilians.
The Kurdish-led Syrian Democratic Forces have shared new video of the Syrian army shelling a large weapons depot.
