ELDERSBERG, Md. (WJZ) — Students in Carroll County are back in class after a bomb scare at an Eldersberg high school.

Liberty High was evacuated Tuesday morning after graffiti was found on a bathroom wall.

School officials say the graffiti contained threatening language, believed to be a bomb threat.

Police used bomb sniffing dogs to search the school.

No explosives were found and students were allowed back into the building.