Modi will be arriving at the city airport tomorrow at around 1.15 PM by a special flight en route to neighboring Kerala for campaigning.
After a five minute-halt, he will shift to helicopter and leave for Palakkad in Kerala, some 40 km from here, police said.
Congress Vice-President Rahul Gandhi will also address an election meeting here on May 7 in support of DMK-Congress-MMK alliance candidates, they said.
BJP President Amit Shah is scheduled to visit the city for an election meeting at the same ground on May nine.
BJP and alliance party leaders today inspected works at the spot.
Considering the high profile VIPs, the city will be under tight security cover during the three days, police added.