At least 53 people are reported to have been killed in air strikes on a rebel-held town in northern Syria.
A market was hit, with video on social media showing widespread destruction. Rubble covers the streets and panicked civilians are seen carrying away the injured.
Eyewitnesses say there were three separate strikes.
It is not clear whether the strike was carried out by Syrian government warplanes or those of its ally Russia.
The town is located in an area of Aleppo province that is part of a "de-escalation zone" established earlier this year by Russia and Iran - which support the Syrian government - and Turkey, which backs the rebels.
The zones are credited for creating a drop in violence, but intermittent clashes have continued while humanitarian access is minimal.
The area is largely held by opposition forces and a jihadist group formerly affiliated to Al-Qaeda.
The UK-based Syrian Observatory for Human Rights, which monitors the country's civil war through a network of sources on the ground, said children were among those killed.
Both the Observatory, and The Syria Civil Defence, whose rescue workers are also known as the White Helmets, gave the death toll as 53.
A journalist for the pro-opposition news website Zaman Al Wasl, Ahmed Primo, tweeted that three Russian warplanes had fired missiles at the market.
The entire market, which contained more than 100 shops, was destroyed, he said.
- Thank you for participating in discussions on The Star, Kenya website. You are welcome to comment and debate issues, however take note that:
- Comments that are abusive; defamatory; obscene; promote or incite violence, terrorism, illegal acts, hate speech, or hatred on the grounds of race, ethnicity, cultural identity, religious belief, disability, gender, identity or sexual orientation, or are otherwise objectionable in the Star’s reasonable discretion shall not be tolerated and will be deleted.
- Comments that contain unwarranted personal abuse will be deleted.
- Strong personal criticism is acceptable if justified by facts and arguments.
- Deviation from points of discussion may lead to deletion of comments.
- Failure to adhere to this policy and guidelines may lead to blocking of offending users. Our moderator’s decision to block offending users is final.