A US-led coalition air strike killed at least 18 civilians on Tuesday in the Islamic State group's former stronghold of Raqqa, the Syrian Observatory for Human Rights monitor said.
"International coalition planes targeted water wells where a group of civilians were gathered in the north of Raqqa city, killing at least 18 civilians," Observatory director Rami Abdel Rahman said.
The Britain-based group said four children were among the dead.
The US-backed Syrian Democratic Forces, an alliance of Kurdish and Arab fighters, broke into Raqqa in June and has since wrested 90 percent of the city from IS.
But activists say coalition strikes in support of the operation have killed hundreds of civilians and caused enormous damage.
The coalition says it takes "extraordinary care" to avoid civilian casualties in its strikes and that it investigates credible claims of civilian deaths.
In late September, the coalition acknowledged the deaths of 735 civilians in its strikes on Syria and Iraq since 2014.
But activists say the toll is much higher.
Raqqa has faced water shortages for months because of damage to pipelines caused by suspected coalition strikes.
Even in the early days of the Raqqa assault, residents said they feared being caught in air strikes or shelling when they ventured to wells or the Euphrates River that runs south of the city to draw water.
LEAVE A COMMENT Your email address will not be published. Required fields are marked*
Unicef says funding gap risks pushing millions of Yemeni children to ‘brink of starvation’
UN rights expert urges EU to punish Israeli annexation move in West Bank
Lebanon economic crisis could lead to unrest, warns president
Hamas: West Bank annexation would be 'declaration of war'
Palestinian shot dead
Turkey dismisses Egyptian warning of Libya intervention
Thousands of Palestinians rally against annexation
As Lebanon sinks into crisis, fear of crime grows
Losing sight of the future: Palestinians blinded in one eye