David Toska, reportedly the mastermind of the robbery of the Norwegian Cash Service (NOKAS) offices in downtown Stavanger, was arrested on April 5, the first anniversary of the crime.

The robbery, which was a ruthless and large-scale operation, resulted in the shooting death of police officer Arne Sigve Klungland, making it an exceptionally violent crime by Norwegian standards.

The police investigation to catch the members of the gang behind the NOKAS robbery is the biggest law-enforcement operation ever launched in Norway, and has already cost NOK 65 (USD 10.2) million, probably a bit more than the thieves made off with.

Now investigators say they cannot rule out that the robbery of Munch masterpieces "The Scream" and "Madonna" from the Munch Museum in Oslo on August 22 last year was part of a maneuver from the band behind the NOKAS heist. The goal would have been to tie up investigative resources by creating a spectacular art theft.

On the grounds that the members of the various criminal networks in the underworld in Oslo and eastern Norway know each other, police inspector Iver Stensrud is optimistic that more than one case may be solved by the NOKAS investigation.

"I would therefore not rule out that the arrests in the NOKAS case will lead to a positive development in the investigation of the Munch case," Stensrud told Aftenposten.

Police have biological trace evidence in the getaway car used in the Munch robbery, and have an increasing number of suspects in custody to test.

The Malaga arrest of Toska, in the company of a 28-year-old Norwegian suspected of being behind a major hashish smuggling operation, is another indicator to police that Norway's criminal circles often merge, with multi-faceted international criminals becoming the norm.

"It is interesting for us that these two were arrested together. It is relevant to raise the question of whether part of the robbery take has been used to purchase large quantities of hashish, and this is something the police will investigate closely," Stensrud said.