Historic military planes collide at Dallas Air Show

Two historic military planes collided and crashed to the ground during an air show in Dallas on Saturday, federal officials said. It is unclear how many people were on board, or if anyone was injured on the ground.

Paramedics rushed to the crash site at Dallas Executive Airport, about 10 miles (16 km) from downtown Texas.

A Boeing B-17 Flying Fortress and a Bell P-63 Kingcobra collided and crashed at around 1:20 p.m. local time, the FAA said in a statement. The collision occurred during the Memorial Air Force Wings Show over Dallas.

The B-17 was a massive four-engine bomber that was the cornerstone of U.S. air power during World War II. A US fighter, the King Cobra was used primarily by the Soviet military during the war. According to Boeing, most B-17s were scrapped at the end of World War II, with only a handful remaining today, mostly displayed in museums and air shows.

In some videos posted to Twitter, a fighter plane appeared to collide with a bomber, which crashed to the ground, creating a large ball of fire and smoke.

The FAA and the National Transportation Safety Board had launched an investigation.