‘Scream’ thieves may be pros

Norwegian police checked a flood of tips Tuesday in the hunt for armed thieves who stole Edvard Munch’s “The Scream,” and new details showed the robbers were more professional than first thought.

Police have no suspects or major theories about motives for Sunday’s dramatic theft in front of dozens of tourists at Oslo’s Munch Museum, the first armed robbery at a Norwegian gallery.

The museum reopened to visitors Tuesday.

The thieves twice dropped the paintings as they ran from the gallery to a getaway car. But new evidence shows in other ways they knew what they were doing. For instance, they smashed the wooden picture frames and threw them out of the car along the escape route, possibly fearing a tracking device was implanted in the wood.