North Dakota oil boomtown: 'Suicides and cold-related deaths'

The oil boom has been a blessing and a curse to the North Dakota city of Williston - crime is surging, women are afraid to walk the streets alone and homeless jobseekers sleep rough in sub-zero temperatures.

Pastor Larry Duffy has experienced the harsh life himself - he was living on the streets a decade ago - and now helps find shelter and food for others.

The BBC joined him for a delivery run and met up with some of the homeless trying to survive a brutal winter living in their cars.

Produced by the BBC's Anna Bressanin