KARACHI: Two bureaucrats have been booked over an advance payment of Rs8.5 billion to contractors of the Yellow Line BRT project in an alleged case of misuse of authority, it emerged on Monday. The Yellow Line is planned to connect Quaidabad’s Dawood Chowrangi with Numaish and will exclusively use electric buses to ensure it remains environmentally friendly. The advance payment, which caused significant financial losses to the Sindh government, violated the contract, as the contractors were required to arrange financing from the commercial market.