Two Second World War-era planes collide during Dallas air show

A damaged plane sits at the Dallas Executive Airport in Dallas after two historic military planes collided (Liesbeth Powers/The Dallas Morning News via AP)

Two historic military planes have collided before crashing to the ground during an air show in Dallas, Texas.

It is unclear how many people were on board the Second World War-era bomber and fighter involved or if anyone on the ground was hurt after the incident at Dallas Executive Airport, about 10 miles from the city centre.