New Delhi, Nov. 9 (PTI): Opposition Shiromani Akali Dal (SAD) today joined the ruling Congress councillors in tendering resignation to protest resumption of the controversial drive against unauthorised commercial establishments in Delhi.

Onkar Singh Thapar, Deputy Leader of the Opposition in the Municipal Corporation of Delhi, a SAD councillor from Pratapnagar, and Subhash Malhotra, Congress councillor from Jangpura resigned from their posts.

Malhotra, who held the post of Chairman of the Gardens Committee of the civic body, handed over his resignation to the Leader of the House Jitender Kochhar, while Thapar sent his resignation to party chief Parkash Singh Badal.

Earlier, 19 Congress councillors, including members of the Standing Committee, had resigned from their posts as a mark of protest against the Supreme Court-ordered sealing of illegal commercial establishments operating in residential areas.

BJP has termed the resignation of councillors as a "political stunt" and questioned the rationale behind submitting such letters to party leaders.

"If the councillors are so concerned, they should give their resignations to the Mayor," BJP Leader Vijendra Gupta said.