An “active shooter situation” unfolded in Atlanta, Georgia, on Wednesday, which left multiple people injured. The shooter, whose pictures were released by the police, was still at large.

The incident unfolded took place inside a building on West Peachtree Street between 12th Street and 13th Street, according to the police. The residents around the area were told to shelter in place and to avoid the area.

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At 12:42 p.m., Atlanta police tweeted: “We are working an active shooter situation inside a building on West. Peachtree St, between 12th St and 13th St. We are aware of multiple people injured. No suspect is in custody. Anyone in the area is asked to secure their building and shelter in place. Anyone not in the area is asked to stay away. We will communicate via social media and our website with updates.”

A BOLO has been released on the suspect.

Police released four images of a suspect on social media. The alleged shooter was seen pointing what appears to be a handgun inside a set of glass doors, wearing a gray or black hoodie, and carrying a bag.

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Another update said, “Three have been transported to the hospital for treatment and a fourth has been pronounced deceased on scene. Officers are actively searching for the suspect and any other victims. Based on our preliminary investigation, these are photos believed to be of the active shooter. Anyone with any information on this person’s whereabouts is asked to call 911. The suspect is believed to be armed and dangerous and should not be approached.”

According to Channel 2, a reporter witnessed hundreds of heavily-armed officers outside a Northside Hospital facility, located at 1100 West Peachtree Street Northwest.

Multiple agencies including Atlanta police, Atlanta fire, MARTA police, Georgia Tech police and the Georgia State Patrol have responded to the situation. The building where the shooting took place was being evacuated. Traffic has been shut down in the area.