Internet search giant Google says it is investing 300 million euros ($390 million) to expand its continental European data center.

. said Wednesday it will upgrade the facility in Belgium to meet growing demand for its online services.

The information underpinning Google's services—Internet search requests, or YouTube—is processed in industrial-scale data centers such as the Belgian plant in St. Ghislain southwest of Brussels.

Google says the center currently has some 120 employees and is one of the most energy-efficient facilities of its kind.

The company, based in Mountain View, California operates other data centers catering for the European market in Ireland and Finland.