A mentally challenged teenage girl, belonging to the Sikh community, was allegedly raped by two men inside an ambulance in Nankana Sahib on Sunday.According to the FIR registered by the police, a copy of which is available with The Express Tribune, the 15-year-old victim went missing from her home at midnight on Saturday.The girl's parents began searching for her and also went to the Gurdwara Sahib, a Sikh place of worship. They said after searching pillar to post, at 1:30am, they found a Rescue 1122 ambulance abnormally parked at a bypass for over 2o minutes.When they sneaked inside the vehicle they found that two men, who have been identified as Ahsan Ali and Sameen Haider, were sexually assaulting their daughter.The family began calling out for help leading to the 'culprits' leading to an ensuing chase, after which the girl was thrown out of the vehicle.The alleged culprits then managed to flee the scene.The girl's family has called for justice to be served for the heinous crime and the culprits be taken to task.Police have registered a case against the suspects while a medical examination is being conducted of the victim.