A year-long protest against an oil pipeline in North Dakota appears to be nearing its end, although some remain in defiance at a deadline to leave.
Some demonstrators who ignored requests to depart were arrested, and makeshift wooden structures were set ablaze.
A boy aged seven and a girl, 17, are being treated for burns following two explosions resulting from the fires.
A federal judge has rejected a request by two Native American tribes for an emergency order blocking the pipeline.
The two tribes say the $3.7bn (£2.8bn) pipeline creates a risk of water pollution and endangers sites they consider sacred.
The protest camp was located on federal land near the Standing Rock Sioux Reservation.
US President Donald Trump has signed an executive order authorising the Dakota Access Pipeline to proceed, arguing it will bring huge economic benefits.
When completed, by Dallas-based Energy Transfer Partners, the project will take oil through the Dakotas and Iowa to …