The ship is now in port and could face fines after a police investigation, the Norwegian Coast Guard said Wednesday in a news release.

Norwegian rules require all trawlers to announce plans to leave waters claimed by Norway at least 12 hours in advance, and meet inspectors on demand. The coast guard said "Opon" failed to meet for inspection on March 19, as agreed.

Norway's inspection of Russian trawlers has frequently been a sore point in relations between the neighboring countries.

The Russian ship was at a fishing bank called Tromsøflaket, near the Norwegian coast, not in the zone Norway claims around the Arctic Svalbard archipelago despite Russian protests.

One of the most serious Norway-Russia showdowns in the Arctic was in October, when the Russian trawler "Elektron" fled the Svalbard zone with two Norwegian inspectors aboard.

The inspectors were released after the "Elektron" reached Russian waters. The ship's captain, Valery Yarantsev, was charged Tuesday by Russian prosecutors for illegal fishing and illegal detention of the inspectors.