World

Swedish submarine hunt sends Cold War chill across Baltic Sea region

  • In this amateur photo provided by Sweden's armed forces and distributed by the TT News Agency on Sunday, Oct. 19, 2014, a partially submerged object is visible in the water at center, in the Stockholm archipelago, Sweden. The Swedish military said Sunday it had made three credible sightings of foreign undersea activity in its waters during the past few days amid reports of a suspected Russian intrusion in the area. (AP Photo/Swedish Armed Forces via TT News Agency) SWEDEN OUT

    In this amateur photo provided by Sweden's armed forces and distributed by the TT News Agency on Sunday, Oct. 19, 2014, a partially submerged object is visible in the water at center, in the Stockholm archipelago, Sweden. The Swedish military said Sunday it had made three credible sightings of foreign undersea activity in its waters during the past few days amid reports of a suspected Russian intrusion in the area. (AP Photo/Swedish Armed Forces via TT News Agency) SWEDEN OUT  (The Associated Press)

  • Swedish corvette HMS Stockholm patrols Jungfrufjarden in the Stockholm archipelago, Sweden, Monday, Oct. 20, 2014. Sweden's biggest submarine hunt since the dying days of the Soviet Union has put countries around the Baltic Sea on edge, with Latvia's foreign minister calling the incident a potential "game changer" in the region. (AP Photo/TT News Agency, Anders Wiklund) SWEDEN OUT

    Swedish corvette HMS Stockholm patrols Jungfrufjarden in the Stockholm archipelago, Sweden, Monday, Oct. 20, 2014. Sweden's biggest submarine hunt since the dying days of the Soviet Union has put countries around the Baltic Sea on edge, with Latvia's foreign minister calling the incident a potential "game changer" in the region. (AP Photo/TT News Agency, Anders Wiklund) SWEDEN OUT  (The Associated Press)

  • Swedish corvette HMS Stockholm patrols Jungfrufjarden in the Stockholm archipelago, Sweden, Monday, Oct. 20, 2014. Sweden's biggest submarine hunt since the dying days of the Soviet Union has put countries around the Baltic Sea on edge, with Latvia's foreign minister calling the incident a potential "game changer" in the region. (AP Photo/TT News Agency, Anders Wiklund) SWEDEN OUT

    Swedish corvette HMS Stockholm patrols Jungfrufjarden in the Stockholm archipelago, Sweden, Monday, Oct. 20, 2014. Sweden's biggest submarine hunt since the dying days of the Soviet Union has put countries around the Baltic Sea on edge, with Latvia's foreign minister calling the incident a potential "game changer" in the region. (AP Photo/TT News Agency, Anders Wiklund) SWEDEN OUT  (The Associated Press)

Sweden's biggest submarine hunt since the dying days of the Soviet Union has put countries around the Baltic Sea on edge, with Latvia's foreign minister calling the incident a potential "game changer" in the region.

In a scene reminiscent of the Cold War, Swedish naval ships, helicopters and ground troops combed the Stockholm archipelago for a fourth day Monday for signs of a foreign submarine or smaller underwater craft that officials suspect entered Swedish waters illegally.

While Sweden hasn't said what foreign country they suspect — and Moscow denies involvement — the submarine search sent a chill through the Baltic Sea region, where Russian forces have been accused of a series of border violations on land, sea and air in recent months.