BJP district president S Suresh alleged that CPI-M was behind the attack and said the incident happened at about 8.30 pm. He said police came to the spot very late.
Suresh said the party has called for a 12-hour shutdown from 6 am to 6 pm in the district.
The attack comes in the backdrop of the attempt to manhandle CPI(M) general secretary Sitaram Yechury in New Delhi by two men who claimed they were members of a group called Hindu Sena.