Berlin - Workers digging on the underground network in the western city of Duesseldorf have uncovered a 34-kilogram woolly mammoth tusk over 10,000 years old, city officials said on Tuesday.

Excavation work was stopped immediately while the 1.20-metre-long tusk was gently removed and taken away for scientific study, Duesseldorf authorities said in a statement.

The tusk was the only part of the animal found during the dig some 12 metres below the surface.

Woolly mammoths died out in the region around present-day Germany some 10,000 years ago. - AFP