An investigation is underway after firefighters were called to a second turbine fire within a few months at a wind farm in the US state of Pennsylvania, the latest in a string of blazes reported at the project.

The fire on Saturday 13 March destroyed the nacelle of a turbine at the Locust Ridge project north of Mahanoy City.

The West End Fire & Rescue service, which said nobody was hurt, posted a video of the incident on its Facebook site of crews supervising the fire as it burnt itself out.