Patiala, April 28 -- Patiala Police has busted a Pakistan's ISI-backed pro-Khalistani terror module allegedly responsible for a late-night attempted explosion on a railway track near Shambhu, arresting four radicalised habitual offenders and recovering a significant quantity of arms and explosives, officials said on Tuesday.

Those arrested have been identified as Pardeep Singh Khalsa of Mansa, Kulwinder Singh alias Bagga of village Bappiana in Mansa, Satnam Singh alias Satta of Panjwarh in Tarn Taran, and Gurpreet Singh alias Gopi of Goindwal Bypass in Tarn Taran. According to officials, all accused have prior criminal cases registered against them.

The recovered material includes one hand grenade, two .30 bore pistols with ammunition, ...