Channi's nephew Bhupinder Singh alias Honey was arrested in this case by the agency.
The ED action, sources said, has been initiated after taking cognisance of a 2018 FIR of the Punjab Police against some companies and individuals alleged to be involved in illegal sand mining in the state.
On January 18, the agency had raided his premises and claimed to have seized about Rs 8 crore cash.
The ED on Wednesday said it has seized cash amounting to over Rs 10 crore, including about Rs 8 crore from a relative of Punjab Chief Minister Charanjit Singh Channi, during raids conducted in connection with an anti-money laundering investigation against illegal sand-mining operations in the poll-bound state.
