Official sources indicated that the searches were held following "some inputs," but they did not elaborate.
Income Tax officials were also "assisting," the local poll officials, they told PTI.
The outcome of the searches were not known immediately.
Following information about the searches, a large number of DMK workers gathered in front of Kanimozhi's house expressing solidarity.
She is also the BJP's State unit president.
The DMK chief said his party would work towards ushering in reforms in the appointments of Chief Election Commissioner, Election Commissioners and State Chief Electoral Officer.
"If needed, we will not hesitate to approach the Supreme Court," he said.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)