Lorries have begun evacuating civilians from the last village in Syria still held by the Islamic State (IS) group.
A convoy of about 50 lorries arrived on the outskirts of Baghuz after Ms Bachelet spoke, amid rumours of a deal to evacuate the wives and children of militants. But none of the vehicles had departed by nightfall, according to Reuters news agency.
Bali said he did not know how many people were being brought out, or whether they included any IS militants, but that it would become clear once the lorries reached a nearby SDF screening point.
On Tuesday, the SDF said that its fighters would attack the IS pocket once it had evacuated all the civilians who wanted to leave. The militants, it warned, had only two options - surrender or die.