Cheap thrills and escaping the area of crime on high speed bikes have made bikers, mostly in the age group of 18-25, a terror for the people of Kolkata, police officials said.
A French woman staying at Jodhpur Park in south Kolkata was recently molested at night by one such gang that also beat up a man accompanying her when he protested.
"I live in Behala. There have been incidents when I face harassment at the hands of bikers while returning home late at night," said a woman banker.
Kolkata police, to tackle the menace, have launched night-long offensives on weekends against molesters and biker gangs in various parts of the metropolis including important junctions such as J L Nehru Road, APC Road, AJC Bose Road, Park Circus crossing and Lenin Sarani.
"We have kept up the tempo and are conducting such operations every night mostly on Fridays, Saturdays and Sundays," Additional Commissioner of Police (III) Debashish Roy told PTI.
Since July 26 over 900 bikers have been prosecuted by the police, 25 motorcycles seized and 10 bikers have been arrested, he said.