TOKYO - A strong earthquake with a preliminary magnitude of 6.2 and depth of 140 km (87 miles) hit northern Japan's Hokkaido prefecture on Sunday evening, the Japan Meteorological Agency said.

The epicentre of the earthquake was off the coast of the town of Urakawa, the agency said, adding that a tsunami warning had not been issued.

(Reporting by Chang-Ran Kim; Editing by Alex Richardson)