Apple to build $1 billion campus in Texas, new sites in Seattle, San Diego and Culver City

Apple announced Thursday it will build a $1 billion campus in Texas as part of a nationwide expansion.

The facility will be less than a mile from the tech giant's existing facility in Austin and initially accommodate 5,000 additional employees, with room to grow to 15,000.

As it stands, 6,200 people now work for Apple in the Texan capital -- the largest cluster outside its headquarters in Cupertino, California.

Employees at the new campus will work in fields including engineering, R&D, operations, finance, sales and customer support, Apple said in a statement.

"Apple is proud to bring new investment, jobs and opportunity to cities across the United States and to significantly deepen our quarter-century partnership with the city and people of Austin," Apple CEO Tim Cook said.

"Talent, creativity and tomorrow's breakthrough ideas aren't limited by region or zip code, and, with this new expansion, we're redoubling our commitment to cultivating the high-tech sector and workforce nationwide."

Apple also said it plans to boost its employee base in regions across the United States over the next three years.

It will expand to over 1,000 employees each at new sites in Seattle, San Diego and Culver City, California, and add hundreds of jobs in Pittsburgh, New York, Boulder, Colorado, Boston and Portland.

Apple said it plans to invest $10 billion in US data centers over the next five years, including $4.5 billion this year and next.

Earlier this month online retail giant Amazon also announced a major expansion, saying it will build a new headquarters divided between Long Island City in New York and Crystal City, across the Potomac River from Washington, DC. It says this $5 billion investment will create 50,000 jobs.