Twelve mobile phones were seized from inmates of a Bihar jail during a raid early on Wednesday, police said.
Half a dozen mobile chargers, SIM cards and other objectionable items were also recovered from the prisoners of Beur central jail in Patna, police said.
A police team led by Senior Superintendent of Police Vineet Vinayak raided the jail, where several gangsters, criminals turned politicians and Maoists are lodged.
The raid was conducted following the murder of a businessman who was robbed by unidentified assailants in Patna on Monday night. Police received information that inmates were freely using mobile phones to operate their criminal gangs.