Unidentified persons hurled petrol bombs at the Porur head office of Naam Tamilar Katchi, headed by actor-politician Seeman, police said.
Party sources said the incident happened in the wee hours of today but none was injured in the incident.
The statues of Rajiv Gandhi were found damaged at Otteri and Vepery here and local Congress functionaries staged protest against this.
Workers of pro-Tamil outfit "Tamil Padai" (Tamil Force) had yesterday tried to storm the headquarters of the state Congress Unit to condemn the Centre's stand over the release of convicts in the Rajiv Gandhi assassination case.
Later, Naam Tamilar Katchi, also held a protest on the same issue.
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