Melbourne supermarket groper still on run

Police are appealing for help to catch a man who struck a woman over the head with a bottle after sexually assaulting her twice in a Melbourne shopping centre.

Described as balding and with missing teeth, the alleged offender grabbed the 38-year-old's bottom while following her into a Preston shopping centre and then grabbing her breast in a supermarket last Friday.

They say the man, aged in his 40s, hit the woman after she pushed him away with a basket and before fleeing the store, flagging down a car and being driven away.