At slightest 39 people – including 12 children – have been killed in a blast that brought down a building in Syria’s especially rebel-held north-western range of Idlib, reports say.
The building in a Sarmada city is pronounced to have contained munitions belonging to an arms trafficker.
Dozens of people are still missing, a guard and correspondents say.
Idlib is a final vital rebel-held area, and is approaching to be a subsequent aim for Syrian armed forces.
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On Sunday, rescuers in Sarmada used bulldozers to mislay a rubble and lift out trapped people, an AFP match in a city nearby a Turkish limit reported.
Hatem Abu Marwan, a member of a Idlib polite counterclaim team, pronounced that “buildings full of civilians were reduced to rubble”, a news group said.
Meanwhile, a UK-based Syrian Observatory for Human Rights (SOHR) pronounced that there were still dozens of people missing.
Some reports advise a series killed could be higher.
Most of those in a building are believed to have belonged to a families of jihadist fighters who have taken retreat in Idlib after being driven out of other areas of Syria.
The means of a blast was not immediately known.