Officials investigate Monday morning explosion at St. Louis federal building

St. Louis police and federal officials are looking for a man who threw an explosive device at a federal building in downtown St. Louis.

Police say the device, similar to a Molotov cocktail, hit the Robert Y. Young Federal building early Monday.

No one was hurt and the device caused only minor damage to the side of the building.

Police are reviewing surveillance video that shows a man tossing the device. They also are looking for the owner of a gray Chevrolet Camaro with partial license plates "N5O."