"Traveling out of the country for a few days on a short visit. Thanks again to all who met & wished me y'day, truly grateful for your affection!", he said on Twitter.
Gandhi had celebrated his 46th birthday only yesterday amid speculation that he could be elevated as the party chief on that day.
Gandhi's 56-day mysterious sabbatical last year had created much controversy in political circles with the ruling BJP making his absence in the midst of Budget session of Parliament an issue.
Party leaders have time and again said that Gandhi, who was made the party Vice President in January 2013 at the Jaipur 'Chintan Shivir,' will be elevated soon.
Congress is passing through a difficult phase since its debacle in the May 2014 Lok Sabha polls and has faced a string of defeats in Assembly elections, including in Assam and Kerala.

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