Sudan is at breaking point.
After 17 months of a brutal civil war which has devastated the country, the army has launched a major offensive in the capital Khartoum, targeting areas in the hands of its bitter rival, the paramilitary Rapid Support Forces.
The RSF seized most of Khartoum at the start of the conflict, while the army controls the twin city of Omdurman, just across the River Nile.
But there are still places where people can, and do, cross between the two sides.
The BBC’s Barbara Plett-Usher reports from Sudan.
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