Patiala, April 29 -- Police on Tuesday unearthed a pro-Khalistan terror module, backed by Pakistan's ISI and arrested four men following a botched sabotage attempt on the Rajpura-Shambhu railway line on Monday night.

The breakthrough came after a suspected bomber, Jagroop Singh of Panjwar Khurd in Tarn Taran district, was killed when his explosive device detonated prematurely during an attempt to target the freight track near Bathonia village.

The explosion, which occurred around 10pm on Monday, caused minor damage to the freight rail corridor track and briefly disrupted train movement before services were restored after emergency repairs.

It was the second such attempt in the past three months, targeting the freight rail corridor trac...