Police said two persons were earlier arrested after the WBSEDCL divisional manager of Malda Saibal Mazumdar filed a complaint of assault of officials on Friday by Trinamool Youth Congress leader Biswajit Ray alias "Bullet".
The total number of arrests in the case now stood at nine, police said.
The seven arrested were produced in the court of the Chief Judicial Magistrate (CJM), Malda and the verdict is awaited.
Earlier, the two arrested were produced in the court of the Chief Judicial Magistrate, Malda yesterday and remanded to judicial custody.
Ray however, is absconding, police said.