DMK chief MK Stalin's son Udhayanidhi Stalin was detained in Tamil Nadu's Nagapattinam on Friday during the party's campaign launch for next year's polls. Police said that DMK had broken COVID-19 rules as conducting political meetings is not allowed due to the pandemic. "AIADMK government could not tolerate my campaign...when people started protesting, they had to release me," Udhayanidhi said.