BALTIMORE, MD (WCMH) — Baltimore fire officials say two buildings at the Johns Hopkins Hospital complex have been evacuated Thursday afternoon because of a possible tuberculosis exposure, WBAL reports. 

In a statement released at 2:13 p.m., a hospital spokeswoman said: 

The Baltimore City Fire Department is actively investigating the possible release of a small amount of tuberculosis during transportation in an internal bridge between Cancer Research Building 1 and Cancer Research Building 2. Employees were in the area when the incident occurred, and these employees have been isolated and are expected to be evaluated by the Fire Department. As a cautionary measure, both Cancer Research Buildings have been evacuated. So far, all indications are that no other individuals have been exposed, however the buildings will remain evacuated until cleared by public safety officials.

Hospital employees tell WBAL a fire alarm was pulled and they were told to evacuate the building at 1501 Jefferson Street. Some employees said they were advised not to walk down a certain hallway. 

Officials said some people who were exposed were being sheltered in place.