KARACHI: The mezzanine floor roof of a building in the Saddar neighborhood of Karachi collapsed on Sunday night, injuring several individuals and damaging motorcycles and vehicles parked beneath it, ARY News reported.According to rescue officials, the building is located near the Saddar mobile market. The exact cause of the collapse has not yet been determined.Following the incident, rescue teams and police arrived at the location. A few people sustained injuries in the collapse and were immediately transferred to a nearby hospital for treatment.Teams from the Sindh Building Control Authority (SBCA) are expected to arrive shortly to inspect the building’s structural integrity.Yesterday, a passenger bus overturned near Gulshan-e-Hadeed on the National Highway this evening, killing one person and wounding 70 others.According to rescue sources, the injured include women and children, all of whom have been shifted to a nearby hospital.Some of the injured were discharged from the hospital after giving them first aid, while the rest of othersTraffic flow was severely disrupted on the side of the highway where the accident occurred, resulting in a massive traffic jam with long queues of vehicles.Meanwhile, the bus driver fled the scene immediately after the crash.