A man armed with a gun was shot dead in Duncanville, Texas, on Monday after he walked into a facility where children were attending a youth summer camp, authorities said.

No children, staff or police officers were harmed during the incident inside the Duncanville Fieldhouse, Duncanville police said. 

Officers responded around 8:45 a.m. to reports that a man with a gun was inside the building, where about 150 children were attending a summer camp, Duncanville Police Officer Michelle Arias told reporters at the scene.

"Officers located a subject armed with a gun and engaged the subject," Arias said. "The subject was struck and officers provided first aid. The suspect was transported to the hospital and later pronounced deceased."

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No additional information about the man or why he entered the building was immediately available.

Texas summer camp shooting

Police shot and killed a man armed with a gun after he walked into the Duncanville Fieldhouse, where about 150 children were attending a summer camp, police said. (FOX4 Dallas-Fort Worth KDFW)

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Police said the summer campers were being moved from the Fieldhouse to the Duncanville Recreation Center, where parents could pick them up.