LEADERS around the Baltic Sea reacted warily today to reports that Russia could revise the borders of its territorial waters in the region.

In a draft proposal reported by some Russian media, Russia’s Defence Ministry suggests updating the co-ordinates used to measure the strip of territorial waters off its mainland coast and that of its islands in the Baltic Sea.

The existing co-ordinates were approved in 1985, the ministry says; saying, they were “based on small-scale nautical navigation maps” and do not correspond to the “modern geographical situation.”