BMX bandit wanted by police A KNIFE-WIELDING teenage boy has robbed a bottle shop south of Sydney before fleeing on a BMX bike, police say. The teenager was spotted stashing cigarettes and bottles of liquor into his backpack at the Mittagong bottle shop about 7.25pm (AEDT) on Wednesday. Police say a 35-year-old shop assistant approached the boy, who then threatened her with a large knife. The teenager stole cash from the shop's till, before fleeing the scene on his BMX bike. The shop assistant wasn't injured in the incident, police said.