The ED arrested a businessman in New Delhi in connection with its money laundering probe in the over Rs 5,000 crore alleged bank fraud case involving a Gujarat-based pharma firm and few other hawala deals. Official sources said the central probe agency arrested Gagan Dhawan early today from the national capital under sections of the Prevention of Money Laundering Act. They said Dhawan will be produced before a court for further custody. Dhawan, they said, was on the radar of the agency for allegedly aiding bank loan frauds related to Sterling Biotech, the Vadodara-based company and few other similar alleged illegal transactions. The firm and Dhawan are also being probed by the Enforcement Directorate for allegedly bribing senior income tax department officials as part of an earlier criminal complaint.