The Supreme Court Thursday questioned the issuance of black warrants by trial courts for execution of death penalty even before the expiry of 60-day time period for filing of appeals in the apex court by the convicts. The top court’s observation came during the hearing of an appeal, filed by death row convict Anil Surendra Singh Yadav, alleging that the black warrant was issued by a Gujarat sessions court just 33 days after his conviction was upheld by the high court.