Qureshi, two employees of his business firms and two hawala operators based in Turkman Gate and Greater Kailash-I area here were brought to Directorate's Delhi office where they were questioned by the sleuths, official sources said.
Qureshi was quizzed for close to four hours while others were questioned for some more time, the sources said.
They said a total of seven premises, five of Qureshi and two belonging to the alleged hawala operatives, were searched by sleuths under the provisions of the FEMA.
Qureshi's flat in posh Defence colony and his palatial residence-cum-farmhouse in Chhattarpur were also searched by ED officials, officials said, adding few documents and computer peripherals have been seized.
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Officials said the searches were launched as the agency was "looking for documents and evidence" in connection with the dealings of the businessman against whom the Income Tax department carried out a similar exercise last year for alleged tax evasion.
The ED has taken over the case after the I-T department shared documents indicating hawala and alleged violations of FEMA laws by the businessman and his business entities based here.