At least 18 people, including women and children, have been killed in air strikes on areas in the last major rebel stronghold in north-west Syria.
Authorities have barred the wife of a former British army officer who founded the White Helmets volunteer group from leaving Turkey pending the investigation into his death, according to reports.
Amnesty International has called for an “exhaustive” investigation into the death of a British civil defence worker who fell from a balcony in Istanbul just days after Russia accused him of being a spy.
A British diplomat has said the UK will look “very closely” at an investigation into how a former British soldier died in Turkey days after Russia accused him of being a spy.
A former British army officer who helped found the White Helmets volunteer organisation in Syria has been found dead in Istanbul, Turkish officials said.