A collision between a speeding motorcycle and a donkey cart killed a youth besides causing injuries to his father, near here on Wednesday. According to hospital sources, Ali Nawaz of Chak 16/1-L and his son Gul Nawaz were travelling towards city on a motorbike when their two-wheeler hit a donkey cart coming from opposite direction near Peer Di Hatti. Gul Nawaz died on the spot while severely injured Ali Nawaz was shifted to local hospital from where he was referred to Lahore.