The vessel in which Environment Minister M C Sampath had gone to mid-sea to inaugurate a boat race, was towed back by a fisherman's boat, Sub-Inspector of Police V Balakrishnan said.
On return to shore, the minister said the engine had suddenly malfunctioned and there was no other problem.
The race, in which at least 80 boats participated, was organised by the local AIADMK unit in connection with Chief Minister Jayalalithaa's 65th birthday, which fell on February 24.