New Delhi, Dec 10 (ANI): The Supreme Court on Wednesday further extended the stay on the execution of Yakub Abdul Razak Memon, lone death row convict in the 1993 Mumbai serial blasts case. The court issued notices to STF Maharashtra and CBI on Memon's plea seeking review of death penalty in the blasts case. The court had on March 21, 2013, upheld the death sentence of Memon. At least 257 people were killed in 13 blasts at several Mumbai landmarks, including the Bombay Stock Exchange, a popular cinema and two crowded markets.