Video: Town evacuated after propane truck explosion

More than 200 people were evacuated from the town of Callaway Credit: AP

A town in Minnesota was evacuated after a freight collided with a propane truck - causing a huge fire ball.

Residents of Callaway were urged to leave their homes after the train carrying empty grain cars to Canada derailed on Thursday afternoon.

One locomotive and seven empty train cars came off the tracks, while the propane truck exploded later that evening.

Two train crew members were treated for non life-threatening injuries.

While fire crews contain the burning tank, more than 200 Callaway residents are not allowed to return home and are taking shelter at a nearby church.