Soldiers and officials in northeastern Japan are warning residents that the area could be hit by another tsunami and are ordering residents to higher ground.

Sirens around the town of Soma went off late Monday morning and public address systems ordered residents to higher ground.

Kyodo News Agency said the tsunami could be 3 metres high, citing Fukushima prefectural officials.

An Associated Press reporter stood about 100 metres from the coast.

The area was hit by a massive quake and tsunami on Friday.