The CBI has denied it has carried out a search or raid but only visited his house in connection with a case.
"So, did they (CBI) come for tea," Singh asked.
Displaying exasperation, Singh told a press conference that instead of the "daily harassment", the Centre should simply suspend the Delhi government.
AAP spokesperson Raghav Chadha added in a tweet: "Centre's Bureau of Intimidation".
"Today's raid signals the resolve of the Centre to not let the AAP government work. The BJP wants to obliterate the opposition. The intention is to take revenge through relentless harassment," Singh said.
The government denies influencing CBI.
CBI officials said they "visited" the residence of Sisodia to seek clarification about a preliminary enquiry (PE) against him relating to alleged irregularities in a social media event by Kejriwal called 'Talk to AK'.
Singh said 'Talk to AK', a programme to interact with the public, was held using the services of a public relations company, which did not charge the government. He said no tender was floated for the event as platforms such as Facebook, YouTube and Google have no competition.
The CBI had registered the PE in January this year on the basis of a complaint filed by the Vigilance Department of the Delhi government.
It was alleged in the complaint that a consultant of a well-known PR company was hired by the Delhi government to promote the event and that a Rs 1.5-crore proposal was prepared for this purpose.
"One may question why a particular PR company was chosen," another AAP leader, Saurabh Bharadwaj, told reporters here. "That's because the DIP (Directorate of Information and Publicity) was not capable of handling the job," he said.
The PR firm, he added, was already working for the government and was "empanelled with it".
"So naturally, the government approached the consultancy. We may not have gone for a tender, but the point is this company did not charge any commission," Bharadwaj said.
The complaint said despite objections from the Principal Secretary, the government went ahead with the proposal. The consultant spent money on the campaign, thereby creating a liability for the government.
"When not a penny was spent on Talk to AK programme, how does CBI come into the picture? Caged parrot not briefed properly by masters again. Caged parrot CBI feeding false info to its PROs. No consultant was hired for Talk To Ak - challenge anyone to show any payment made," Delhi government spokesperson Nagendar Sharma said in a series of tweets.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)