The mishap occurred at the 'Ayyan Theerthavari Kulam' when more than 2,000 devotees tried to take a holy dip along with the priests of the temple who entered the waters with the sacred trident this morning, police said.
Four persons identified as Punniakodi, Venkatraman, Siva and Manikandan, who were assisting the temple chief priest in the prayers, drowned in the tank, police said.
The priests had performed special poojas for the trident since midnight yesterday and also for the presiding deities Lord Arunachelswarar and Sri Abhidhakujambal culminating in the 'Maha deeparathanai' (aarti).
The ceremony was followed by "theerthavari" (holy dip) early this morning. As the priests took the dip holding the trident, devotees gathered there too attempted to follow suit, triggering the stampede.
District Collector A Gnanasekaran and DIG of Police Tamil Chandran along with other senior officials rushed to the spot and oversaw the rescue operations.
Mahodhaya amavasya (new moon day) is considered very auspicious as it repeats only once in 30 years or so and a large number of people had gathered to worship their forefathers and also take a holy dip.
