NEW DELHI: Delhi Chief Minister Arvind Kejriwal Tuesday accused his arch-rival Narendra Modi of waging a political vendetta, branding the Indian premier a “psychopath” after federal investigators raided his city administration’s headquarters.

The firebrand chief minister, who founded and leads the anti-corruption Aam Aadmi party, is a bitter opponent of Modi and they have clashed repeatedly in recent months.

The Central Bureau of Investigation (CBI) confirmed officers had raided the Delhi city government headquarters and 13 other locations in connection with a corruption case involving Kejriwal’s principal secretary Rajendra Kumar.

Civil servant Kumar, in a previous role, “abused his official position” by awarding government contracts to a favored private firm over seven years, along with six others, CBI spokeswoman Devpreet Singh told reporters.

Another official told AFP on condition of anonymity that cash and property deeds had been recovered from Kumar’s home.

News of the raid was broken by Kejriwal himself, who posted on Twitter that “CBI raids my office” and then accused Modi of being “a coward and a psychopath” who could not “handle me politically.”

Although his initial comments sparked an uproar, Kejriwal was unrepentant when he later addressed reporters.

“I have a message for Mr. Modi: ‘You can’t scare me. You have no idea what I’m made of. I won’t be afraid even until my last breath’,” he said.

“My words may have been harsh but it is you who have committed the real misdeeds.

“Why don’t you apologize to the country for your misdeeds first and then I’ll apologize for my words,” Kejriwal added, in an apparent reference to Modi’s refusal to apologize over deadly communal riots in Gujarat when he was chief minister in 2002.

The raid triggered chaos in parliament where Finance Minister Arun Jaitley said repeatedly that it “has nothing to do with Mr.Arvind Kejriwal” and ridiculed the suggestion it was politically motivated.

“The search is in relation to a case for an alleged offense committed in his (Kumar’s) capacity before he joined the office of Mr.Kejriwal,” he told the upper house of parliament, his voice drowned out by opponents.