ED has registered a money laundering case against Singh under provisions of the Prevention of Money Laundering Act (PMLA) after taking cognisance of a criminal complaint filed by the CBI in this regard in September.
Describing the Congress silence over it as "shameful", BJP said the Sonia-led party has tried to dismiss the corruption charges against Singh.
"BJP has been taking up the issue of corruption against the chief minister while Congress has not only kept quite but also tried to white wash the charges against him," party secretary and in-charge of Himachal Pradesh Srikant Sharma said in a statement.
Taking on Singh, the longest serving chief minister of Himachal Pradesh, BJP said he has lost moral right to remain on his post and should resign immediately.
Referring to the Congress stand on corruption during the last Parliament session, BJP said, "it has also exposed the double standard of Congress as it has disrupted the monsoon session on the issue of alleged corruption involving NDA leaders."