Craig Hutain, 63, Len Root, 66, Terry Barker, 67, Curtis Rowe, Dan Ragan, and Kevin Michels all die after two planes collide mid-air at the Dallas Executive Airport in Dallas, Texas

Two historic military planes collided and crashed to the ground Saturday during an air show in Dallas, exploding into a ball of flames and sending plumes of black smoke billowing into the sky.

Emergency crews were responding to the scene at the Commemorative Air Force Wings Over Dallas show at the Dallas Executive Airport.

The Federal Aviation Administration says a Boeing B-17 Flying Fortress and a Bell P-63 Kingcobra collided and crashed around 1:20 p.m. Saturday. At least five pilots perished.

Leah Block, a spokesperson for Commemorative Air Force, which produced the Veterans Day weekend show and owned the crashed aircraft, told ABC News she believed there were five crew members on the B-17 Flying Fortress bomber and one aboard the P-63 Kingcobra fighter plane.

A Bell P-63 Kingcobra crashed in the rear part of the fuselage of a B-17 Flying Fortress at the Commemorative air Force Wings Over Dallas air show at the Dallas Executive Airport, according to the FAA.

While authorities have not publicly identified any of those killed, Dallas County Judge Clay Jenkins confirmed the death toll from the crash was six in a tweet early Sunday. The collision involved two World War II-era planes, a Boeing B-17 Flying Fortress and a Bell P-63 Kingcobra.

Rowe served more than 30 years in the Air Patrol, holding every aircrew rating possible and earned his Command Pilot Rating.

The five members of the B-17 flight crew were Terry Barker and Leonard “Len” Root, both of Keller; Dan Ragan; Curt Rowe, of Hilliard, Ohio; and Kevin Michels, of Austin. The P-63 was flown by Craig Hutain, who was from the Houston area.

The Commemorative Air Force, which put on the show, on Monday identified the victims as: Terry Barker, Craig Hutain, Kevin “K5” Michels, Dan Ragan, Leonard “Len” Root, and Curt Rowe.

The NTSB says before or during the flight there was no discussion of 'altitude deconfliction', or flight information that would have reduced the risk of a midair collision. 

According to the report, citing air show radio transmissions and aircraft surveillance data, the “air boss” directed the fighters to transition to a trail formation and fly in front of the bomber formation before proceeding near the 500-foot show line.