Rajouri, Sept. 12 -- Three mobile phones were recovered during a search operation inside the highly-guarded district jail in Rajouri district, sources said on Thursday.

Acting on inputs, the searches were conducted in the jail premises by different teams under the supervision of jail administration, they said.

The devices, which did not contain SIM cards, were sent to the forensic laboratory for examination.

A case has been registered in this connection and an investigation initiated to ascertain how the phones reached the jail, where a three-tier security system is in place, the sources added.

"The jail premises are digitally secured through jammers, and it is claimed that no mobile network is available inside and near the premises, ...