It was an unusual day's work for emergency workers in Graboszewo, Poland, on Wednesday as they were called out not to clear flames, but chocolate.

A tank truck carrying 12 tons of liquid milk chocolate overturned in the early hours of the morning after colliding with a traffic barrier, causing waves of the sugary liquid to coat Poland's A2 motorway between Wrzesnia and Slupca.

The incident led to a rather sticky situation as traffic came to a complete standstill. Police said  it could be several hours before the road would be able to reopen.

According to the manufacturer, spilled chocolate is more difficult to remove than oil and needs to be shifted gradually using pressurized hot water.

In some areas, the chocolate was so thick that heavy machinery was brought in to scoop up the mess.

The driver suffered a broken arm and was taken to hospital.