Residents of a camp for displaced people in northern Syria have accused government forces of dropping two barrel bombs.
Footage posted to YouTube appears to show dead women and children and burning tents inside the Abedin refugee camp in Idlib province.
The UK-based Syrian Observatory for Human Rights said 10 civilians died in the attack. Official Syrian news sources did not report the incident.
Barrel bombs are crudely-made containers filled with nails, metal shrapnel and explosive that are dropped from helicopters.
The attack could not be independently verified.
Hassan is the fourth Portsmouth man killed fighting in Syria. His family want the government to make it easier for fighters to come home.Read the full story ›
Tobias Ellwood, Foreign Office minister for the Middle East, said there could be no excuse for the "reprehensible treatment" suffered by Dr Abbas Khan at the hands of the Syrian regime.
“Dr Khan’s imprisonment without consular access was unacceptable. The Foreign Office consistently sought access and pressed for his detention to be reviewed including through ministers and international partners.
The Syrian regime ignored these approaches. It can no longer do so. His family deserve answers and those responsible for Dr Khan’s death should be brought to justice. This is yet another example of the brutal nature of the Syrian regime which has killed thousands of innocent civilians.”
The family of a 32-year-old south London doctor who died in a Syrian prison has welcomed a jury's finding that he was unlawfully killed.
Abbas Khan was captured in Aleppo in November 2012 after travelling from Turkey and died in December last year.
Following a two-week trial at the Royal Courts of Justice, the jury found there was no evidence that he had gone to Syria to fight.
Outside court, Dr Khan's brother, Afroze Khan, said: "We have always maintained that our brother was an innocent man who travelled to Syria for no other reason than helping injured civilians in the conflict. We have always maintained that he was mistreated, maltreated and tortured by the Syrian authorities and that he was murdered by the Syrians.
"Today, our position as a family has been vindicated completely. All the allegations against my brother - that he had gone for any other reason - have been disproved today."
A 30-year-old chemistry teacher who admitted to planning to travel to Syria to fight against president Bashar al Assad will be sentenced in December.
Jamshed Javeed, 30, from Levenshulme in Manchester, pleaded guilty to two counts of engaging in conduct in preparation of terrorist acts at Woolwich Crown Court in south east London.
He admitted going to Syria to support the rebels opposing the Assad regime, but insisted he "never supported and does not support the aims of Isis as now revealed and understood".
The jury at the inquest of Dr Abbas Khan has ruled that the British doctor was unlawfully killed when he died in a Syrian prison in December 2013.
The medical cause of death was not ascertained but the jury concluded Dr Khan was deliberately and intentionally killed without any legal justification.
School teacher Jamshed Javeed, 30, from Manchester, has pleaded guilty at Woolwich Crown Court to two Syria-related terrorism offences
US forces conducted five air strikes against Islamic State targets near the embattled Syrian city of Kobani, the U.S. Central Command said on Sunday.
Other members of coalition completed 12 separate strikes in Iraq - nine air around the strategic Mosul Dam and three air strikes southeast of Fallujah.
"In Syria five air strikes near Kobani destroyed seven ISIL vehicles and an ISIL building," Central Command said in a statement, using another acronym for Islamic State," Central Command said.
Islamic State militants tried to seize a border post in the Syrian town of Kobani on the Turkish frontier overnight but were repulsed by Kurdish fighters, officials said.
Islamic State fighters have been trying to capture Kobani, known as Ayn al-Arab in Arabic, for over a month, pressing their assault despite U.S.-led air strikes on their positions and the deaths of hundreds of their fighters.
British IS hostage John Cantlie has featured in another propaganda video released by the militant group.
In the video Mr Cantlie talks about the executions of other British and American hostages and blames the US and UK governments of not negotiating their release.
He also described life with the other captives and said: "Unless we tried something stupid like escaping or doing something we shouldn't, we were treated well by the Islamic State."
As in previous footage Mr Cantlie appears to be speaking under duress and from a prepared script while sitting behind a desk and wearing orange clothing.