Muthuraman, who suffered injuries in his hand and leg, was admitted to a private hospital, police said, adding, his condition is out of danger.
The assailants fled the scene when Muthuraman raised an alarm, police said.
Union Minister of State for Road Transport and Highways Pon Radhakrishnan visited him at the hospital. Condemning the incident, he urged the police to take immediate steps to find out those behind the attack.
"Attacks on our party workers were continuing in the state. Police should take stern actions to bring an end to this and find out those people behind targeting Hindu outfit leaders", he said.
Few months back BJP state executive member M R Gandhi sustained injuries when a four-member gang attacked him with sharp edged weapons when he was on a morning walk. The gang members were arrested later.