WASHINGTON (Reuters) - The U.S. Postal Service will close or consolidate operations at 140 mail processing sites through February 2013, a postal official said on Thursday.

USPS Chief Operating Officer Megan Brennan said the agency's two-phase process would also involve shutting or consolidating operations at an additional 89 facilities beginning in February 2014.

(Reporting by Emily Stephenson; Editing by Jackie Frank)