In a major development in Delhi Chief Minister Arvind Kejriwal’s residence renovation row, the Central Bureau of Investigation (CBI) on Wednesday began a preliminary inquiry into alleged financial irregularities in the renovation of CM’s bungalow.

“A preliminary investigation is not a criminal case but the beginning of a criminal investigation. If CBI finds evidence during the probe then it will register a regular case or a criminal case,” said the officials.

The CBI officials asked the Delhi PWD to submit all the documents related to the renovation of the CM’s residence. The probe agency directed officials to submit all the files by October 3.

The CBI will investigate whether there was unnecessary expenditure or financial irregularities in the renovation of the CM residence.

The Bharatiya Janata Party (BJP) has been protesting against the Kejriwal government ever since the matter surfaced a few months ago. The saffron party coined the issue as ‘Kejriwal ka sheesh mahal’. BJP made a replica of Kejriwal’s residence to attack the Delhi government, accusing Kejriwal of misusing public money.