The Supreme Court today issued notices to Chennai-based Advantage Strategic Consulting Private Ltd and its offshore sister concern on a plea of Janata Party President Subramanian Swamy seeking initiation of contempt proceedings against them for filing a defamation suit in Singapore against him.

"We will issue notices to two companies to seek their responses... returnable within 12 weeks," a bench of justices G S Singhvi and K S Radhakrishnan said, moments after Swamy rose to advance his arguments on his contempt petition.