New Delhi/IBNS: The Central Bureau of Investigation (CBI) has now summoned Delhi Chief Minister Arvind Kejriwal for questioning over alleged corruption in the capital's now-scrapped liquor policy that led to the arrest of his deputy Manish Sisodia in February, media reports said.

Kejriwal has been reportedly asked to appear for questioning on Sunday.

This will be the first instance in recent times where a Chief Minister has been summoned by the central agency in an investigation.

Earlier the Aam Aadmir Party (AAP) denied all charges against the party leaders as "vendetta" and efforts by the BJP, which governs at the centre, to target one of Prime Minister Narendra Modi's most vocal critics.

"Not a single leader of the AAP will be intimidated by these motivated charges. Many of our ministers, leaders and members have been targeted in the past. Our fight against the most corrupt government of PM Modi will go on," senior party leader Sanjay Singh said.

The CBI is probing allegations that the liquor policy implemented by the Delhi government last year, which ended government control over the sale of liquor in the capital, gave undue advantages to private retailers.

Manish Sisodia's arrest in February was the highest-profile arrest in the case so far.

The following month, the Enforcement Directorate arrested him while he was still in jail over allegations of money laundering in the case.