The Enforcement Directorate on Tuesday searched premises of Delhi Chief Minister Arvind Kejriwal's personal assistant Bibhav Kumar and others as part of a probe into charges that bribes generated from "irregularities" in the DJB tendering process were routed as election funds to the AAP, official sources said.

About 10-12 premises in the national capital were covered by the officials of the federal agency since 7 am as part of the raids being undertaken under the Prevention of Money Laundering Act (PMLA).

The residence of Bibhav Kumar, former Delhi Jal Board (DJB) member Shalabh Kumar, office of party Rajya Sabha MP and national treasurer N D Gupta and a Chartered Accountant (CA) Pankaj Mangal apart from some others linked to the party that rules Delhi, are being covered by the officials of the agency.

Delhi minister Atishi charged that the latest raids on AAP leaders were being carried out to "scare" the political party.

The raids pertain to a probe linked to alleged irregularities in the tendering process of the DJB in which the ED arrested retired Jal Board chief engineer Jagdish Kumar Arora and contractor Anil Kumar Aggarwal on January 31.

A special PMLA court on Monday extended their remand by five more days after the ED claimed their further custodial interrogation was required to unearth the "larger conspiracy".

The money laundering case stems from an FIR registered by the CBI on charges of corruption and bribery in the DJB.

The CBI FIR alleged that Arora awarded certain contracts of the DJB to NKG Infrastructure Ltd. for a total cost of Rs 38 crore "despite the fact that the company did not meet the technical eligibility criteria".

The probe found that the NKG Infrastructure Ltd obtained the bid by allegedly submitting forged, fake and false documents, according to the ED sources.

Arora is alleged to have been "aware" of the fact that the company does not meet the technical eligibility.

The sources said that he received "bribe" amounts both in cash and bank accounts and passed these alleged kickbacks to Bibhav, Shalab Kumar, Pankaj Mangal and others.

The kickbacks, according to the sources, were also passed on as election funds to the AAP.

The ED investigation found that the contract of DJB was awarded at "highly inflated rates" so that the bribes could be collected back from the contractors.

A records analysis by the ED found that out of the contract value of Rs 38 crore, only about Rs 17 crore was spent towards the tender work and the remaining amount were "siphoned off in guise of various fake expenses." Such fake expenses, the ED claims, were booked for bribes and elections funds.

The ED raids came on a day when party leader and minister Atishi had promised to do an "explosive expose" on the agency.

She claimed in a press conference that the ED 'deleted' audio recording of witness statements in certain cases, including the excise policy probe, being investigated against AAP functionaries. The minister challenged the agency to produce them in front of the court and the country.

Atishi said searches were being carried out at the residence of Gupta and his personal assistant apart from the PA of CM Kejriwal.

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