(CNN) — Secretary of State Hillary Clinton was hospitalized Sunday after doctors discovered a blood clot during a follow-up exam related to a concussion she suffered this month, her spokesman said.
She is expected to remain at New York Presbyterian Hospital for the next 48 hours so doctors can monitor her condition and treat her with anti-coagulants, said Philippe Reines, deputy assistant secretary of state.
Two weeks ago Clinton sustained a concussion after becoming dehydrated and fainting.
Clinton had been suffering from a stomach virus at the time, according to a statement on from Philippe Reines, deputy assistant secretary of state.
Secretary Clinton had been scheduled to testify on Capitol Hill Thursday about the deadly attack in Benghazi, Libya, in September that killed four Americans, including the U.S. ambassador but she did not testify.
She was expected to return to work at the State Department this week after being sidelined for the past three weeks.