Mystery deepened Sunday over a Swedish military operation triggered by “foreign underwater activity” off the coast of Stockholm, amid an unconfirmed report of a hunt for a damaged Russian submarine.

Late Saturday, Swedish armed forces stepped up an operation — involving more than 200 men, stealth ships, minesweepers and helicopters — in an area about 50 kilometres (30 miles) east of the Swedish capital. The manoeuvres were initiated Friday after the armed forces said they had been informed of a “man made object” in the water. [Read more] – Michael’s Blog