BOGOTA (AFP) - Gunmen, including three in police uniform, stole US$3 million (S$3.85 million) in gold and platinum on Wednesday from a warehouse in Medellin, northwestern Colombia, police said.

A crew of eight men overpowered security guards and fled with the loot in a car and motorcycles, all of which bore police markings.

The precious metals were in the warehouse awaiting shipment to the United States, regional police commander Jose Angel Mendoza said.