A rifle-toting gunman wearing tactical gear and carrying multiple clips was fatally shot Monday after exchanging fire with federal officers outside a Downtown Dallas court building, police said.

The gunman, identified as Brian Isaack Clyde, was seen on video near the doors to the Earle Cabell Federal Building at about 8:50 a.m. before running across the street and into a parking lot, where he falls down.

He was brought to an area hospital, where he was pronounced dead, said Matt DeSarno, special agent in charge of the FBI’s Dallas Field Office. No one else was injured during the incident, police said.

Dallas police said a bomb squad was inspecting the suspect’s vehicle, and later said they planned to conduct a controlled explosion of it.

Dallas Morning News photographer Tom Fox, who was at the courthouse, took of a picture of Clyde where he is seen wearing a ski mask, a vest, and a utility belt. Fox said the man shot at the door of the building.

Witnesses told NBCDFW that they heard between 15 to 20 shots.

This is developing story. Check back for updates.