text: Norway Searches for Treasured Masterpieces OSLO, Norway - Norwegian police said Monday that they were working on several tips in their search for two Edvard Munch masterpieces, including a version of "The Scream," after a bold daytime theft from an Oslo museum in front of stunned visitors.    The paintings were stolen from Oslo's Munch Museum on Sunday by masked, armed thieves, who pulled them from the walls as visitors and staff watched...