WASHINGTON - U.S. Secretary of State Hillary Clinton was admitted to a New York hospital on Sunday, after the discovery of a blood clot stemming from a concussion she suffered earlier this month, reports the AP.

“In the course of a follow-up exam today, Secretary Clinton's doctors discovered a blood clot had formed, stemming from the concussion she sustained several weeks ago. She is being treated with anti-coagulants and is at New York Presbyterian Hospital so that they can monitor the medication over the next 48 hours,” said the State Department on Sunday.

“Her doctors will continue to assess her condition, including other issues associated with her concussion. They will determine if any further action is required.”

Clinton suffered a concussion in mid-December, after she fell at home, where she was recovering from a stomach virus.

“The seriousness of a blood clot "depends on where it is," Dr. Gholam Motamedi, a neurologist at Georgetown University Medical Center who was not involved in Clinton's care, ” told the AP.

Clots in the legs are a common risk after someone has been bedridden and are treated with six months of blood thinners to allow them to dissolve on their own and to prevent further clots from forming, he said.