Police are on scene at a hit-and-run that took place Sunday morning in northeast Calgary. Police responded just after 8:30 a.m. to the back alley in the 700 block of 4A Street. They say a witness saw a newer model black GMC Sierra 1500 hit someone and then drive away. The victim was transported to hospital with life-altering injuries. Police say the back alley is closed to traffic while the investigation continues.