Observers were shocked after two planes crashed on Saturday during a World War II air show at the Dallas executive airport in the United States.

According to reports, a plane crashed into another mid-aid which caused both planes to go up in flames seconds later.

In a statement on Saturday by the Commemorative Air Force (CAF), the status of those on board has not yet been determined.

“This afternoon, two aircraft were involved in a mid-air collision at Dallas Executive Airport. The aircraft were a B-17 Flying Fortress and P-63 Kingcobra, both out of Houston,” the statement reads.

“Currently we do not have information on the status of the flight crews as emergency responders are working the accident.

“The Commemorative Air Force is working with local authorities, the FAA, and the NTSB will conduct a thorough investigation into the cause of the accident.”