An investigation is underway after a turbine collapse that closed one of Europe’s largest and newest onshore wind farms just weeks after it was inaugurated.

A turbine fell at the 475MW Nysäter project in northern Sweden around midday on Saturday, said a statement on the project’s website.

No one was injured but there was a suspected oil leak from the affected turbine’s gearbox and the entire wind farm is now closed, it added, urging the public to stay away.

"We suspect that oil from the gearbox may have leaked and the relevant authorities are informed," said the statement.