A truck full of milk is on fire on a dock in the Auckland suburb of Papakura.

Papakura station officer Kingsley Jones said a truck's engine area caught on fire at Fonterra Milk Factory but he's not sure what caused the blaze.

"It was out pretty quickly. It took a matter of minutes."

Fire Safety will investigate the cause of the fire.


Fire shift manager said no one has been injured.

Police officers are in attendance.

Fire services put out the blaze.