Omaha police were called to Millard Family Hospital around 1 a.m. Monday.Upon arrival, they spoke with the 18-year-old victim who said she was injured when she and some friends were attempting to sneak into a closed pool at the Autumn Grove Apartments on South 156th Court. The teen said she slipped while climbing the fence and impaled her left arm on the spiked top.She was taken to the hospital by her friends.Police believe alcohol was involved. It is not clear if the victim will face any charges.