Ahead of the February 14 polls, Sonia was to hold meetings in Agartala and Kumarghat but it has been cancelled due to her illness, said Falerio, party in-charge of Tripura.
Earlier, Prime Minister Manmohan Singh had also cancelled his trip. He was scheduled to address people yesterday at Ambassa in Dhalai district.
Congress vice-president Rahul Gandhi would hold four public meetings in Tripura tomorrow to campaign in favour of party candidates for the elections, Falerio said.