Brian Issack Clyde is Army veteran who opened fire outside Dallas federal courthouse

Brian Issack Clyde, 22, was fatally shot after exchanging gunfire with federal officers outside the Earle Cabell Federal Building in Dallas

Brian Issack Clyde is Army veteran who opened fire outside Dallas federal courthouse
Brian Issack Clyde, 22 (pictured), has been fatally shot after exchanging gunfire with federal officers outside the Earle Cabell Federal Building in Dallas. No one else was reported injured in the encounter

Brian Issack Clyde, 22, was fatally shot after exchanging gunfire with federal officers outside the Earle Cabell Federal Building in Dallas

'I don't know how much longer I have, I'm f***ing ready': Army veteran, 22, posted photos of ammunition and warned of an approaching 'storm' on Facebook before he was shot dead by police when he 'opened fire outside Dallas federal courthouse'

Police said no one else was injured in the 8.50am encounter on Monday

Dallas Morning News photographer Tom Fox said he saw the shooter, wearing a black mask open fire, cracking the glass in the courthouse door

Video shows Clyde in a black mask carrying a gun running from the sidewalk near the courthouse to a parking lot across the street

Clyde reportedly served in the US military for less than two years before he was discharged

In recent weeks, Clyde's Facebook postings have grown increasingly dark and disturbing

He posted pictures of weapons and ammunition, and in a post on June 9 he warned that a 'f**king storm was coming'

FBI, ATF, FPS, U.S. Marshals and the Dallas Police Department are investigating

Federal agents have asked anyone with information about Clyde or the incident to call 1-800-CALLFBI. People can submit video and photographs at tips.fbi.gov