Hong Kong police have arrested a 34-year-old gym user in connection with the installation of three suspected pinhole cameras found in changing rooms at a 24/7 Fitness branch in Sha Tin. The arrest on Sunday came a day after police launched an investigation into the suspected voyeurism case at the outlet on Lek Yuen Street. A police spokesman said officers arrested the suspect, a local man, in Sha Tin and he remained in custody as investigations continued.