A Louisiana town has been evacuated after officials discovered 6m lb (2.7m kg) of explosive material that they say were stored illegally.

State police found the stockpile of M6 artillery propellant stacked outdoors and without authorisation in buildings in the 800-inhabitant town of Doyline.

The discovery was made by officials during a follow-up inspection after a blast at Explo Systems in October.

Officials expect to work over the next two days to secure the explosives.