Seizure of Rs 14.92 lakh was made by flying squads and static surveillance teams of the Election Commission, according to the poll authorities.
While three AIADMK activists (Dinakaran's Amma faction) were arrested for allegedly attacking DMK cadres over a row, 25 others were arrested on the basis of 15 cases registered for alleged distribution of money to the voters, police said.
The attack on DMK men was over a row related to alleged money distribution, they added.
DMK Working president M K Stalin visited a hospital where his party cadres were admitted following the attack.
More From This Section
He alleged that Dinakaran-led AIADMK faction was trying to bury democracy by using money power.
Speaking to reporters here, he said his party was preparing to deal with the matter legally, besides taking it up with poll authorities.
Commenting on the alleged money distribution, PMK chief Ramadoss demanded countermanding of RK Nagar bypoll.
The bypoll should be held by drafting officers only from outside of Tamil Nadu and by deploying Central police forces, he said.