68-year-old Qureshi died last night, his son M Sajid said.
Qureshi, a former Science and Technology Minister, is survived by two sons and a daughter.
(Reopens DEL63)
The agency had slapped fresh charges under PMLA after taking cognisance of the I-T department's charge sheet (also called prosecution complaint) against Qureshi in alleged tax evasion case in a local court last year.
The ED had earlier been probing this case under forex violation laws after the I-T department first shared documents indicating hawala and alleged contravention of forex laws by the businessman and his business entities based here.
The agency early last year had also conducted searches on Qureshi's premises and had questioned him.
Income Tax department, during its probe, had found Qureshi had 11 bank lockers in the names of his employees and associates but the articles in it belonged to the businessman.