Updated

MADRID-- Officials say they are evacuating some 600 residents from a small coastal town on the Spanish Canary island of Hierro because of volcanic activity in the area.

Tuesday's decision by the regional government to evacuate La Restinga town came after the National Geographic Institute confirmed there was an undersea eruption some 3 miles off the coast Monday and that another eruption closer to Hierro island is possible.

No damage was caused by Monday's eruption.

Hierro, with 11,000 residents, has been on alert level 2 in a scale of 4 in recent weeks for fear of an eruption, but officials insist an eruption is not likely to be major.

The Canary Islands lie off the coast of northwest African and were formed by volcanic activity. Hierro has some 500 volcanoes.