US forces on the ground in northern Syria are helping a major offensive against the Islamic State group in its stronghold of Raqa province, Kurdish-Arab fighters battling the jihadists say.

Near the frontline north of the ISIS bastion of Raqa city, American commandos climbed onto a low rooftop carrying US-made anti-tank missiles.

“These are US special operations forces and this is why you cannot follow them or take many pictures,” said a fighter with the Syrian Democratic Forces, which announced on Tuesday an assault on the jihadists north of Raqa.

Leaning on a partially destroyed home in the village of Fatisah recently seized from ISIS, SDF field commander Hawkar Kobane told AFP that “US forces are taking part in this operation” alongside his own troops. […]