MOSCOW, July 14 (RIA Novosti) - Russian authorities plan to destroy an island drifting in Estonian waters over threat to a Russian hydroelectric plant on the Narva Reservoir, Estonian media reported on Tuesday.

A four-hectare tract of land that was part of Russian territory split off in June and floated over the border before getting stuck near high-voltage lines.

The island is currently 106 meters from the dam at the Russian hydroelectric plant.

An emergency plan to destroy the island will be put into effect if the island moves another 50 meters, the Delfi web site reported.

Both the Russian and Estonian sides are unable to predict the island's movements, but say it could damage nearby buildings.

People are banned from approaching closer to the dam than 500 meters.

There are more than a dozen of islands drifting on the Russian side of the Narva Reservoir, which is on the border between Russia and Estonia.