Delhi Deputy Chief Minister Manish Sisodia is the second minister from the Aam Aadmi Party (AAP) to be arrested by a central agency in less than a year.
Mr Sisodia's colleague and Delhi Health Minister Satyendar Jain was the first AAP minister to be arrested by a central agency in May last year.
The AAP has accused the BJP-led centre of using the Central Bureau of Investigation (CBI) and the Enforcement Directorate (ED) to harass them.
Mr Sisodia and others face corruption allegations in bringing a new liquor sale policy in the national capital. Lieutenant Governor VK Saxena had ordered the CBI probe last year. The Delhi government reverted to the old liquor policy and blamed the Lieutenant Governor for loss of revenue worth crores of rupees.
Mr Sisodia was arrested by the CBI after eight hours of questioning today.
Mr Jain, however, was arrested by the ED in an alleged money laundering case. The probe agency alleged that the minister in the Arvind Kejriwal government was involved in hawala transactions with a Kolkata-based firm in 2015-16.
A hawala system involves two parties transacting money with local agents on their behalf without the funds actually passing through formal banking channels.
Featured Video Of The Day
Preparations For 'Bahuda Yatra' Of Lord Jagannath Underway
Manish Sisodia's Judicial Custody In Liquor Policy Case Extended Again Top Court Judge Recuses Himself From Hearing Manish Sisodia's Bail Plea Delhi Lt Governor Greenlights Probe Against Jailed AAP Leader In CCTV Corruption Case Amid Huge Row, Karnataka Pauses Bill For Reservation In Private Sector Firms Travel Influencer Aanvi Kamdar Dies After Falling Off A Waterfall Near Mumbai UP Banker Dies By Suicide After 6 Months Of Bullying, Body-Shaming UGC Directs Institutions To Enhance Outreach Of Academic Bank Of Credit Major Crackdown Launched On Terror Network In J&K After Doda Encounter UK's New Government Vows To Remove 92 Unelected Peers From Upper House Track Latest News Live on NDTV.com and get news updates from India and around the world.