Swedish police investigate a small boat, center, believed to have been used in the robbery.
A man walked into the waterfront museum five minutes before closing time Friday night, pointed a submachine gun at an unarmed guard and stood watch while two accomplices already inside snatched the paintings off walls. The robbers sped away in a boat moored near the museum. Police found the boat, but not the thieves or the paintings, which museum officials say are worth several million dollars. The robbers spoke Swedish, he said, and police were presuming they were still in the country. The international police agency Interpol was notified anyway, he said.