A stomach virus is forcing U.S. Secretary of State Hillary Clinton to delay by one day a Middle East trip that has implications for the Syrian opposition.

Clinton was scheduled to fly to Morocco on Monday for a meeting of the Friends of Syria group. A State Department spokesman announced late Sunday that Clinton will now leave for Morocco on Tuesday.

The meeting is expected to focus on the 20-month-old Syrian crisis and ways to support the opposition.

Following the meeting in Morocco, Clinton will travel to Tunisia and the United Arab Emirates.