The police were informed of an incident in a garage on Triq il-Qaliet, Marsaskala at 5pm on Friday.
Police went on site and preliminary investigations found that a 13-year-old girl was injured when her leg got caught between a jetski trailer and a wall, while the trailer was being moved into the garage. She was given first aid by a medical team and taken to Mater Dei Hospital by ambulance.
Investigations are ongoing.