In a plot that could have come out of a heist movie, two men on Tuesday raided a Swedish cathedral and stole a set of 17th-century crown jewels, before fleeing the crime scene on a speedboat, according to police and Swedish news outlets.
Tuesday's theft took place at the Strangnas Cathedral, 37 miles west of the capital.
Two people allegedly stole the two crowns and an orb used by the 17th century King Karl IX and Queen Kristina, which had previously been stored in their tomb, before speeding off via the vast system of lakes west of Stockholm, police said in a statement Wednesday.
The royal regalia were originally buried with the couple but were later exhumed and put on display.
Witnesses told Aftonbladet how they were enjoying lunch on a fine day when they saw men running from the cathedral in all directions.
The thieves have not yet been captured.
'We are looking for a small and open motorboat.
The thieves, who have not been identified, and the jewels are being sought internationally via Interpol, Swedish police spokesman Stefan Dangardt said, noting the objects were a "national treasure" and would likely be "very hard to sell".
"We want to spread information and pictures of these items so that they can be identified as stolen objects", police spokesperson Thomas Agnevik said.
Swedish royal crowns of King Karl IX and Queen Kristina and royal orb.
'I have talked to someone at the county administrative board that says it is not possible to put an economic value on them - these are invaluable objects of national interest.
Police immediately pursued the suspects by boat and helicopters.