New Delhi: Pakistan's intelligence agency, Inter-Services Intelligence, trained the terrorists who attacked Dinanagar town of Gurdaspur district in Punjab on Monday.
Sources said, the ISI had trained six terrorists on the Thailand-Myanmar border.
Out of the six, three terrorists attacked Punjab and were killed.
Two others were killed in Pakistan and the last one has been nabbed.
Union Home Minister Rajnath Singh on Thursday held Pakistan responsible for the July 27 Dinanagar terror attack, saying any strike by enemies will meet an effective and forceful response from Indian security forces.
Making a formal statement in the Rajya Sabha, the Home Minister said the central government was committed to rooting out terrorism from the country.
The minister gave details on how the terrorists crossed the international border and entered India.
"A preliminary analysis of the Global Positioning System (GPS) data indicates that the terrorists infiltrated from Pakistan through the area near Tash in Gurdaspur district, where the Ravi river enters Pakistan," Rajnath Singh said.
"It is also suspected that the same terrorists placed five Improvised Explosive Devices on the railway track near village Talwandi between Dinanagar and Jhakoladi which were subsequently defused," he added.