The explosion happened near a local hospital in Cobanbey town. No group has yet claimed responsibility for the attack.
The opposition and rebel withdrawal came after the Russia-backed Syrian regime forces advanced into Khan Shaykhun city in Idlib. The US urged the regime to revert to a ceasefire in Idlib after Monday's air strike on a Turkish convoy.
The capture of Habeet opens up an approach to southern regions of Idlib, which is home to some three million people, many of them displaced by fighting in other parts of the country.
Several people detained by Syrian regime and opposition were simultaneously released in Abu al Zindeen district.
Anas al Dyab, a photographer and videographer in his early 20s, was a member of the White Helmets who also contributed to Turkey's Anadolu Agency.
A doctor who keeps a record of brutal airstrikes in Syria, despite knowing that nothing has been done to stop them, tells TRT World why he continues his work.
The attacks targeted residential areas in the towns of Jisr al Shughur, Khan Shaykhun, Maar Shoreen, Hantoteen and Ain al Bardeh in Idlib province, according to an Anadolu Agency correspondent on the ground.
Another 45 civilians were wounded in the strikes across the opposition-held Idlib region, according to the Syrian Observatory for Human Rights.
Health workers, first responders and hospitals often become a target of Russian and Syrian regime air strikes as bloody assault on Idlib intensifies.
The strikes hit several positions near Damascus and targeted a research centre and a military airport west of Syria's Homs city, the Syrian Observatory for Human Rights said.
Russian news agencies quoted military sources on Wednesday as saying Ankara and Kremlin agreed on a ceasefire in the de-escalation zone of the governorate of Idlib in north-western Syria.
At least 200 regime and Russian air strikes hit northwestern Idlib on Tuesday, killing three people.
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