UPDATE 3-Fire breaks out on tanker at Norway's Sture oil terminal

* Dubai Harmony was loading crude at Sture oil terminal

* Fire broke out in engine room

* Crew helping fire service, terminal partly evacuated

* Terminal output not affected (Adds no impact on output, bullet points)

By Victoria Klesty and Lefteris Karagiannopoulos

OSLO, Sept 13 (Reuters) - A fire has broken out in the engine room of an oil tanker during loading at Equinor's Sture oil export terminal on Norway's west coast, local police and the oil firm said on Friday. The terminal's output was not affected.

The crew of the oil tanker, named by police as Dubai Harmony, is still onboard and assisting the fire service. The Sture oil terminal is being evacuated, police said.

"There is a fire in the machine room of a vessel laying in the Sture area. We do not know what caused the fire," said an Equinor spokesman. "The incident happened during loading of oil from Sture."

The fire did not affect the terminal's output, the company added.

Refinitiv AIS data showed the Dubai Harmony docked at the Sture oil terminal. The Aframax-type ship can carry up to 115,340 deadweight tonnes, AIS data showed.

The Sture oil terminal receives crude oil from the following North Sea fields: Oseberg, Grane, Edvard Grieg and Svalin. (Writing by Gwladys Fouche; Editing by Terje Solsvik and Mark Potter)