Dawn air strikes on a Syrian border town in the Islamic State-held eastern province of Deir al-Zor killed at least 30 people, most of them civilians including more than a dozen children, a war monitoring group said on Monday.
The Syrian Observatory for Human Rights said jets thought to belong to the US-led coalition hit the town of Al-Bukamal near the border with Iraq. They struck near a residential area and a mosque, wounding dozens more, the Britain-based monitor said.
The Islamic State-linked media outlet Amaq said coalition strikes killed 15 people and wounded 35 others in Al-Bukamal.
A spokesman for the US-led coalition against Islamic State did not immediately respond to a request for comment.