Suspected US-led coalition air strikes killed at least 26 civilians in a Syrian village, piling pressure on the alliance after allegations another bombing raid left regime soldiers dead.
The coalition has been bombarding the Islamic State group for more than a year in Syria and neighboring Iraq, where the jihadists have declared a self-styled caliphate.
But according to a monitoring group, strikes on Monday on the village of Al-Khan in northeastern Syria only left civilians dead.
Rami Abdel Rahman of the Syrian Observatory for Human Rights said IS is in control of Al-Khan but is only on its outskirts, "which is why all of the deaths were civilians".
The death toll included at least seven children and four women, he said, adding that it was likely to rise as more than a dozen civilians were still missing under rubble.