The Enforcement Directorate (ED) has arrested Haryana Congress MLA Surender Panwar in an "illegal" mining-linked money-laundering case, official sources said on Saturday. The 55-year-old legislator was taken into custody in the early hours in Gurugram. He will be produced before a special Prevention of Money Laundering Act (PMLA) court in Ambala where the central agency will seek a custodial remand, the sources said.