Tokyo, Apr 20: A powerful 7.4-magnitude earthquake struck northern Japan on Monday, prompting tsunami warnings across several coastal regions, according to national broadcaster NHK.

Authorities warned that waves as high as 3 metres could reach parts of Iwate Prefecture and Hokkaido, urging residents to immediately move to higher ground. Emergency services have been placed on high alert as officials assess potential damage and closely monitor the situation.

In its advisory, officials said tsunami waves were already approaching coastal areas and could strike repeatedly, stressing that evacuation must not be delayed and people should remain in safe locations until all warnings are lifted.

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Authorities also cautioned that wave timings may vary and heights could exceed projections. Residents in affected regions have been advised to stay away from coastlines and river mouths, which may overflow due to incoming surges.

It is a developing story. Stay tuned for more updates.