BJP leader Subramanian Swamy on Monday alleged that the CBI and the Enforcement Directorate had not taken their probe against Karti Chidambaram, son of former Finance Minister P. Chidambaram, to its logical end, and noted that they had been provided details of his "21 undeclared foreign accounts".

Speaking to the media here, Swamy alleged that one of the 21 accounts was "directly owned" by Karti Chidambaram and the "rest by his companies".

"It is shocking that CBI and ED having been provided the details of 21 undeclared foreign accounts of Karti Chidambaram and of the companies he controls, have failed to proceed," Swamy said.

He alleged that Karti, in his election affidavit for 2014 Lok Sabha polls, mentioned that he had no foreign accounts.

Answering a query about the quantum of money in the accounts, Swamy said: "He must have amassed easily a total of Rs 6 lakh crore."

Swamy alleged the Finance Ministry had "favoured" Karti and said he had written to Prime Minister Narendra Modi over the issue.

Hitting out at the Finance Ministry over demonetisation, the BJP leader said, "excellent measure of demonetisation has not produced the full desired result because of lack of cooperation from the ministry".

Karti is being probed by the Enforcement Directorate (ED) in connection with Aircel-Maxis deal.