Police hunt Melbourne sex attacker A SERIAL sex attacker is believed to be behind three assaults in the Melbourne CBD since November. The latest incident occurred on Saturday when a 22-year-old woman walking to Southern Cross station was grabbed by the neck and sexually assaulted in a stairwell. The woman was walking along Flinders Lane about 6am (AEDT) after finishing work when a man approached her from behind, told her to be quiet and forced her to walk until he assaulted her. Police believe the same man stalked another three young females at Southern Cross railway station earlier that morning about 5am, following them into the female toilets. The women locked themselves in toilet cubicles and called police before the man fled the station. Investigators have reviewed CCTV footage and believe the man may be behind another two other serious assaults in South Melbourne and the CBD in November and December. In one incident, a 24-year-old woman was grabbed from behind, dragged onto the ground into a car dealership in the CBD, and assaulted between 2.30am and 3am on December 7. The man had earlier tried to engage her in conversation as she spoke on her phone. He stole her credit card and fled. The same man is also believed to have approached a 22-year-old woman waking along Bourke Street in the CBD between 12.30am and 1.15am on November 9. The man forced the woman into a laneway or shop alcove where he indecently assaulted her. The man is described as Asian or South American in appearance, aged in his late teens to mid 20s, with a slim build and about 165cm tall.