The collision involved “two small private aircraft” and left at least two dead. The death toll could rise, investigators earlier warned.
Local media speculated one of the pilots was “blinded by the low sun” as they approached the airport to land.
Rescuers were unable to approach the crash site for several hours due to fears the planes’ ejector seats could suddenly trigger and injure a member of the emergency crews.
The crash occurred at around 4.15pm local time (3.15pm BST). Rescuers could not access the wreckage until 7.30pm.
The identities of the victims have not yet been confirmed.
Six fire engines and 20 emergency personnel are at the scene.
A police spokesman said: “They were approaching [the airport], I can not say anything more.”