Around 750 jobs could be created after one of Europe's largest offshore wind energy companies agreed to locate its UK turbine manufacturing site in Scotland.
The announcement was made on Monday during the First Minister's visit to Paris.
French firm Areva signed a strategic agreement with Scottish Enterprise, outlining its intention to locate its turbine operation and blade manufacturing facilities in Scotland.
STV understands the facilities will be located somewhere on the Forth Estuary.
The agreement was signed by Areva CEO Luc Oursel and chief executive of Scottish Enterprise, Lena Wilson.
First Minister Alex Salmond said: "Scotland shares Areva's vision of a cleaner tomorrow. Today's announcement provides a further boost to Scotland's position as one of Europe's key locations for offshore wind and takes us another significant step further in achieving our ambitious carbon reduction target.
"The manufacturing of nacelles and blades for these turbines in Scotland will deliver nationwide economic benefits as well as much welcome inward investment to the chosen location once that has been agreed.
"This is another powerful example of how attractive Scotland is for international investors - and is indicative of our shared energy future."
Luc Oursel, CEO of Areva, added: "Areva's industrial heritage and diverse portfolio has placed us firmly at the forefront of low carbon technological solutions. Scotland is known to be a pioneer in renewables and its commitment to offshore wind in particular was a key part of our decision to locate our future UK manufacturing base there.
“This new facility is part of Areva's strategy to establish a manufacturing footprint that will cover the European market."
Scotland's renewable industry has attracted £2.8bn capital investment since 2009.
Ms Wilson said: "This announcement further demonstrates Scotland's position as a leading contributor to the low carbon agenda and ambition to deliver safe and sustainable energy through advanced technology.
"Offshore wind is a key driver of the economic benefit of renewables and we will continue to work closely with Areva to support its development plans in Scotland and create ongoing opportunities for wider industry growth."
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