NEW DELHI: Delhi's Chief Minister (CM) Arvind Kejriwal said his office had been raided by federal investigators on Tuesday, accusing Prime Minister Narendra Modi of waging a political vendetta against his administration.

"CBI (Central Bureau of Investigation) raids my office," Kejriwal, the leader of the anti-corruption Aam Aadmi Party (AAP), said on Twitter.

“When Modi (could not) handle me politically, he resorts to this cowardice... Modi is a coward and a psychopath," the Delhi CM tweeted.

There was no immediate comment from the CBI, but India television cited sources in the bureau as saying the raid was against Kejriwal's principal secretary Rajendra Kumar.

Kejriwal and Modi are bitter rivals and even stood against each other at last year's general election in the Varanasi constituency.

Although Kejriwal was beaten by Modi in the general election, he then oversaw a dramatic landslide victory over Modi's Bharatiya Janata Party (BJP) in polls at the start of the year in the Delhi state assembly.