Air strikes on a Syrian border town in the Islamic State-held eastern province of Deir al-Zor have killed 23 people, most of them civilians, a war monitoring group say.
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 on Monday. The warplanes 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 could not immediately be reached for comment.
Islamic State holds most of Deir al-Zor province, apart from an enclave at the centre and a nearby air base that Syrian government forces control. The province links territory IS militants control in Syria and Iraq.
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The United States military has said it makes "extraordinary efforts" to avoid civilian deaths in its air strikes in Syria and Iraq.
