Police in Madison, Wisconsin say they are responding to a shooting incident at a local Christian school on Monday, saying they have reports of multiple injuries.

Police say they responded to reports of an active shooter at the Abundant Life Christian School at roughly 10:57 am local time. They identified a “juvenile” deceased at the scene who they believe was responsible for the shooting. They are encouraging local residents to avoid the area.

Madison Police Chief Shon Barnes said at least four people in addition to the shooter were killed, and five people have been transferred to a nearby hospital with injuries. Barnes did not clarify whether the deceased individuals were students or teachers.

“This is something you prepare for, but that you hope you never have to do,” a police spokesman told reporters. “Today is a sad, sad day.”

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Barnes clarified that the injuries range from “minor to life-threatening.”

Police went on to say that they train for active shooter situations “almost quarterly,” and that they had most recently conducted the training roughly two weeks ago.

“The Madison Police Department is investigating a shooting at Abundant Life Christian School. Multiple injuries have been reported. This remains an active and ongoing investigation. More information will be released as it is available,” police said in a statement.

“We currently need people to avoid the area,” police added.

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Students have been fully evacuated from the school, and police have conducted multiple clears of the building. Barnes said they were conducting a third check using bomb-sniffing dogs “just in case.”

The FBI’s Milwaukee bureau says it has deployed agents to the scene to assist in investigating.

This is a developing story. Check back soon for updates.