The Customs Department in Mumbai will destroy more than 140 kilograms of narcotic drugs worth Rs 538 crore seized from the city international airport and other places here, an official said on Thursday. These drugs will be destroyed on Friday at the incineration facility operated by Mumbai Waste Management Limited (MWML) located at Taloja in Navi Mumbai, he said. ”The seized drugs, collectively weighing 140.57 kg, comprise 56.06 kg heroin and 33.81 kg hashish, seized by the Mumbai Airport Commissionerate in 14 cases,” the official said.