Scientists in China say they have discovered more than 3,000 dinosaur footprints, all facing the same way.

The footprints - thought to belong to at least six dinosaur types - were found in eastern Shandong province, state news agency Xinhua reports.

Experts believe the prints are more than 100 million years old and say they could represent a migration or a panicked attempt to escape predators.

Dinosaur fossils have been found at about 30 sites in the Zhucheng area.