Over thirty minutes, NBC news reported on Twitter that Hillary Clinton had left the hospital:

Secretary of State Hillary Clinton has left NY Presbyterian Hospital. She was admitted Sunday for treatment of a blood clot in her head.

— NBC News (@NBCNews) January 2, 2013

Twenty minutes later, NBC offered only this sorry retraction:

UPDATE: Early reports mistakenly saying Hillary Clinton was released from hospital have been confirmed to be untrue.

— NBC News (@NBCNews) January 2, 2013

UPDATE: BuzzFeed reports that Clinton left the hospital for an MRI today. And the Daily Mail has pictures. 

NBC News has not reported via its Twitter feed on the latest development.

UPDATE II: Now NBC News again reports on Twitter that Clinton has left the hospital:

JUST IN: Sec. of State Hillary Clinton released from hospital after completing treatment for blood clot

— NBC News (@NBCNews) January 2, 2013