AMRITSAR, April 17 -- Punjab Police busted a terror module backed by Pakistan's Inter-Services Intelligence (ISI) with the arrest of one person and recovery of four hand grenades, officials said on Thursday.

In a joint operation of the state special operations cells of Amritsar and Mohali, the counter intelligence wing of Punjab Police also recovered two foreign-made pistols along with ammunition, director general of police Gaurav Yadav said.

The arrested accused has been identified as Sagar Singh, a resident of Galluwal in Amritsar. The DGP said preliminary investigation has revealed that the accused was acting on instructions of foreign-based handlers and has links with the terror module involved in the grenade attack in Chandigarh. F...