Bolivian police say a tanker carrying alcohol has collided with five cars and caught fire on a highway near the Peruvian border, killing 10 people.
Another 14 people were injured in Saturday's accident, police said.
Transit Police Colonel Dainer Zurita says the alcohol spilled from the lorry and caught fire, burning 11 vehicles.
He says the lorry driver may not have noticed that cars were stopped ahead of him.
Traffic was restricted to a single lane because partiers were occupying part of the road on Friday.
It was a local holiday celebrating the new year 5,521 of the indigenous Andean calendar.