The audacious "night outs" of the killer gang are over.

To the gang of 10 teenaged schoolboys, "night-outs" meant hunt for a prospective prey to rob, not fun-filled parties. Six of them were nabbed on Wednesday. The arrest was the result of an FIR lodged by Ravi Upadhyay, the circulation manager of a vernacular daily, who was robbed a day before.

All the killer gang members are students of top city schools and hail from affluent families. They are in classes between X and XII.

Upadhyay, the circulation manager, was looted near Harihar Chambers, a prime location along the Boring Road area, on Tuesday. The victim was on his way home after his night shift when eight youngsters on four bikes intercepted him. They fled with his cellphone as well as Rs 11,200.

"An FIR was lodged, following which the investigations began and soon the police arrested six of them," Sanjeet Kumar Sinha, the Buddha Colony police station house officer (SHO) told The Telegraph. "These boys call themselves killers. They seem to have got the idea from Hindi films," he added.

Their code word to go on a mission was "night-out". Whenever these boys wished to go around the city, they sounded the code through calls or messages. They moved around the city on bikes and then indulged in one or more criminal offences, mostly thefts and loots.

They made excuses at home, took money from their parents and visited different places in the city, usually after eight in the evening. Mostly, they watched a movie and resorted to robberies on their way back. Riding through Patna Junction or Boring Road, they targeted people who were alone.

The boys used to rough up the victims and loot whatever their "preys" had. Most of their victims were the ones coming out of Patna Junction late in the night.

"They (the killer gang members) have given shape to many crimes in the past and some of them have even gone unreported," said the SHO.

With four members of the group still at large, the police had called the families of the boys after their arrest on Wednesday night. Most of the weeping parents had no inkling about their sons' late night activities.

"It is unfortunate as each of these boys have got expensive motorbikes bought by their parents. It seems that they (parents) gift costly things to their children but forget to keep an eye on them. The investigations are still on," Sinha, the SHO, added.

Psychologists blamed the parents for their children's act.

"Incidents of teenagers getting involved in criminal acts have taken place in Patna often and the onus lies on the parents who gift expensive things to their children and don't monitor the company these kids keep. They are irresponsible and failures as parents," Anil Kumar Singh, a city-based psychologist, told The Telegraph.