HMS Visby
© Reutures/ Marko Savala/TT News AgencySwedish corvette HMS Visby patrols the Stockholm Archipelago, searching for what the military says is a foreign threat in the waters.
Swedish forces have "established contact with something" and are lowering equipment into the water near the island of Ingaro outside of Stockholm where the search for an alleged foreign submarine is currently underway, local media reported Tuesday.

"I can also see that they are lowering some equipment, but I do not have information about this. We are not commenting on the operation in detail," a spokesman for the Swedish Armed Forces is quoted as saying by the Aftonbladet newspaper.

According to the Swedish Dagens Nyheter newspaper, Swedish forces have "established contact with something". Three military ships, including the HMS Stockholm corvette, a patrol boat and a minesweeper, have reportedly gathered in a small area in Ingarofjarden in Stockholm's archipelago and monitoring devises are being lowered into the water.

Swedish forces first launched a major operation off the coast of Stockholm on Friday after receiving information, reportedly from a civilian, about the presence of an unknown underwater object in the region, suspected to be a foreign submarine.