Karnataka Government has decided to install jammers in all jails to curb usage of mobile phones by criminals while in custody, state Home Minister R Ashoka said on Saturday.

"It has come to the knowledge of the government that criminals lodged in jails continue their illegal activities and planned to attack their rivals in jails with the help of mobile phones, he said after releasing telephone directory of reporters brought by Bangalore Reporters' Guild in Bangalore. "Even weapons were making their way into jails and there was a racket in which the associates of criminals hurl mobile handsets into jail premises from outside," Ashoka said.

"To check this menace, the government is also planning to spread nets along the compound and conduct raids by city crime branch squads at regular intervals. There is also a proposal to install CCTV cameras in jails to monitor the activities of inmates", he said. "The government was thinking to constitute special squads to keep vigil on the activities of criminals", Ashoka said.

The Government wants to depute at least 20 police official for training abroad to imbibe investigation skills to detect cyber crimes which weare on the rise, but has not been able to achieve the target due to reluctance on the part of the officials to participate in such programmes, he said.