Police in Germany say 17 people are unaccounted for after a horrific crash turned a bus with more than 40 passengers on board into a charred ruin. The bus went up in flames after crashing into a truck near the Bavarian town of Muenchberg early Monday, the AP reports. Police say 31 people were injured in the crash, some of them critically. A police spokesman tells Deutsche Welle that there is "only a glimmer of hope" that any of the people listed as missing will be found alive. "Perhaps somebody ran away in a state of shock," he says. The BBC reports that it's not clear what caused the crash, which happened as traffic was moving slowly on the A9 motorway. (More Germany stories.)