CHICAGO – U.S. Rep. Jesse Jackson Jr. is being treated at an inpatient medical facility for “physical and emotional ailments” that are “more serious” than previously believed and will require extended treatment, according to a statement released by his office Thursday.

The Chicago Democrat, who faces a House ethics investigation over his ties to imprisoned former Gov. Rod Blagojevich, has been on medical leave for three weeks for exhaustion. His office did not announce the news until last week, when it released a three-sentence statement. No details about Jackson’s whereabouts or condition had been released since then.

A Thursday statement from his office also did not disclose his location or provide details of his medical condition. Messages left for his spokesmen were not immediately returned.