Oil company employees are suspected of selling their skills to oil bunkerers
Under cover of night dozens of barges queue up to dock at a jetty in a creek somewhere in Nigeria's oil-rich Niger Delta, according to the BBC.

Their holds are filled with stolen oil running from valves illegally installed into a pipeline.

Full, they chug downstream to meet around 10 larger ships near the oil export terminal in Bonny, Rivers State, where they disgorge their cargo.

By 0500, in the darkness before dawn, the ships uncouple from the barges and move out in a convoy to sea to rendezvous with a tanker which will spirit away the stolen oil, making it disappear into another cargo, bound for sale on the world market.