LAHORE A 5-year-old girl was killed while her mother sustained injuries when a tractor-trolley hit a motorcycle-e-rickshaw in the Nawab Town area on Monday, police and rescue workers said. Resident of Green Town, Samina Bibi, along with her daughter Noor was traveling on a motorcycle-rickshaw when a rashly driven tractor-trolley hit the three-wheeler from the rear side near Shan Chowk. As a result, Noor sustained serious head injuries and died on the spot. The condition of her mother was critical at a hospital. The driver was arrested and the tractor-trolley impounded.