International Paper Co. has announced the closure of two Georgia paper mills, including a Savannah mill that's been a key part of the local economy for 90 years

International Paper called the decision a series of strategic changes to achieve an advantaged cost position in a press release sent out by the company on Thursday morning.

International Paper announced Thursday it will close the Riceboro containerboard mill and Riceboro Timber and Lumber. The company also announced the closure of the Savannah containerboard mill and the Savannah packaging facility.