molestation

Description

i was walking 200 mts from where i stay, at 9 pm, in Dollars Layout , J P Nagar 4th phase and a man on a bike wearing a helmet hit me on my behind (spanked me) and then groped me in the chest and sped off. since it was raining that day , i could not catch his bike number properly or the make.
similarly there are always guys around who are doing stuff like this in my locality since my room-mate faced a similar problem at 8 pm.there are men who pass snide and chep coments when u walk these streets even at 6 pm when u visit the superstore.
my friend told a police van doing rounds one day , but the security is still very lax.
something should be done. we feel unsafe to step out after dark. and who knows if it happens during the day ? now its just groping, some day it might get worse.