In relation to the Delhi Excise Policy investigation, nearly three dozen locations in Delhi and Punjab are being searched by the Enforcement Directorate (ED), news agency ANI reported.
The AAP, which claims to have emerged from an anti-corruption movement, has been accused of money laundering by the opposition party.
Lieutenant Governor Vinai Kumar Saxena has already suggested a CBI investigation into the situation. The central investigation agency has initiated enormous search operations in response to his advice.
The residence of Delhi Deputy Chief Minister Manish Sisodia, who has been the subject of many investigations, was also searched.
The AAP, on the other hand, has often accused the ruling BJP of abusing investigative agencies. Arvind Kejriwal, the city's chief minister, has even accused the opposition of attempting to destabilise the elected administration.
Previously, the BJP released a "sting" video in which a liquor seller claimed corruption in the formulation and implementation of excise policy. He alleged that the programme funded the governing Aam Adami Party's (AAP) election campaigns this year in Punjab and Goa.
Sisodia, on the other hand, had denied the alleged sting and challenged the CBI to arrest him.
"CBI raided my house, nothing was found. Nothing was found in the locker. CBI/ED investigated, found nothing," Sisodia had tweeted in response to the allegations.
"Now BJP has come with sting. CBI/ED should also investigate this sting. If the allegations are true, arrest me by Monday. Otherwise, PM ji should apologize to me for doing a false sting," he further tweeted.