george's county, where several busy streets have been shut down and hours preventing residents from reaching their homes. this is happening at university parkway and 23rd street and langley park. richard reeve is live at the scene. >> it is still a very active scene. that is one reason. behind me, riggs road and the university boulevard several police cars blocking part of university boulevard. the authorities are in a plaza and a building behind that, looking for a gun man in what began as an attempted robbery. for most of the evening this clause of university boulevard has remained close, sealed off by the police. >> we have never seen nothing like this. >> around 5:00 p.m., an armed, possibly masked man walked into a temp agency and announced a robbery. he fired one shot. >> nobody saw the individual leave the building. at about an hour later five, six people came running out of the building. they said the building is surrounded by cops. >> the police dismissed earlier reports that people were being held hostage. right now, heavily armed officers are checking the building, room by room. >> we are going into the building to do a full search of the building. this building is a three-story