Police opened fire and fatally shot man who had opened fire at Earle Cabell Federal Courthouse in Dallas on Monday.

Footage shows police, other security forces, and sniffer dogs securing the area with a bomb squad robot reportedly heading to check suspect's vehicle for explosives in the parking lot.

According to the reports, the assailant, now identified as 22-year-old Brian Isaack Clyde, was clad in tactical gear, carried a rifle and several magazines.

He was wounded on site and was later pronounced dead after being transferred to an area hospital.

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