Robbers who nabbed two 17th century royal crowns and an orb from a Swedish cathedral remained at large on Wednesday (Aug 1), a day after fleeing their daring midday heist by motorboat.
Witnesses said they saw two men running from the cathedral, which was open to the public and hosting a lunch fair.
Police chief spokesman Thomas Agnevik told Swedish TV the lost objects were "invaluable objects of national interest".
Police quickly mobilised and pursued the thieves by sea, on land, in helicopters and planes.
The crown jewels of Charles IX and his wife Christina were buried with them upon their deaths in 1611 and 1625 respectively.
A police spokesperson said it was possible they hightailed it into the region's hinterlands, or may have used a getaway vehicle to reach Stockholm itself.
Two men vanished after the noon heist Tuesday into a vast patchwork of lakes around Strangnas, 60 kilometers (37 miles) west of the capital of Stockholm, police said.More news: Isil claims attack after four U.S. and European cyclists killed in Tajikistan
'We have some different information about how exactly the boat looked. The artifacts, which date from the 17th Century, are made of gold and enamel and encrusted with beads, crystals and pearls.
We contacted the police and told them and they told us they had taken something from the Cathedral.
"Several people were seen leaving the church by boat or waterscooter after the theft".
Strangnas cathedral has been closed so that "technical examinations" can be carried out, a police statement added.
The items were locked away in alarmed displays at Strängnäs Cathedral, which is located west of Stockholm.
"I have talked to a person at the county administrative board that says that it is not possible to put an economic value on this".