GENEVA (Reuters) – Medecins Sans Frontieres (Doctors Without Borders) said on Tuesday it had suspended most of its medical aid activities in northeast Syria and was evacuating all international staff in the wake of air strikes and violence during Turkey’s week-old incursion.

“The decision to suspend the majority of MSF’s activities comes as the humanitarian situation spirals further out of control and needs are likely to increase,” MSF said in a statement that followed another aid group Mercy Corps suspending its aid work on Monday

Turkey ignored U.S. sanctions and pressed on with its assault on northern Syria on Tuesday, while the Russia-backed Syrian army roared into one of the most hotly contested cities abandoned by U.S. forces in Donald Trump’s retreat.

Reporting by Stephanie Nebehay, Editing by Franklin Paul