The investment plan includes an additional 600 million euros investment in the Hamina data centre in Finland, bringing total investment in the site to 2 billion euros, Finland's Prime Minister Antti Rinne told the joint news conference.

"This is fantastic news for Finland," Rinne said.

Google already has one data centre in Hamina, where it invested 800 million euros to convert an old paper mill. It said in May it would invest 600 million euros in a new data centre on the same site.

Google bought the site from paper firm Stora Enso in 2009. The location is close to the Russian border and uses seawater from the Gulf of Finland to reduce energy used in cooling.

Google's other European data centres are located in the Netherlands, Ireland and Belgium.

(Reporting by Tarmo Virki in Tallinn; Editing by Jason Neely and Edmund Blair)

By Tarmo Virki