WASHINGTON — The State Department is asking a federal court for a one-month extension to publish the last of Hillary Clinton’s e-mails during her time as secretary of state, citing a complex review of some messages across different agencies of the government.

State Department spokesman Mark Toner said Friday the department wouldn’t be able to meet its court-mandated goal of Jan. 29. About 9,400 of 55,000 pages are left, but Toner said those remaining “contain a large amount of material that required interagency review.”

The department will make public as many as possible next week, he said, but is asking for the final deadline to be pushed back until Feb. 29.

“State Department staff have been working extremely hard to process these e-mails, and we are committed to getting them out,” Toner said.