Pakistan’s Inter-Services Intelligence (ISI) unit, known as S1 or Subversion 1, has been driving cross-border terrorism against India for decades, according to intelligence sources. From the 1993 Mumbai blasts to the recent Pahalgam attack on tourists in Jammu and Kashmir, S1’s shadow looms large over major terror incidents.
Headquartered in Islamabad, the unit operates under a Pakistani Army Colonel, with two key officers, code-named Gazi 1 and Gazi 2, managing active missions. Much of its funding reportedly comes from drug trafficking.
S1 operatives are skilled in bomb-making, IED fabrication, and small arms training. They also maintain detailed maps of Indian cities and collaborate closely with terror outfits like Jaish-e-Mohammed, Lashkar-e-Taiba, and Hizbul Mujahideen.
To blend in, S1 trainers often wear local attire and grow long beards, making their identities almost impossible to trace. Even many militant groups remain unaware their trainers belong to this covert ISI wing.
For over 25 years, S1 has trained thousands of terrorists, becoming the central hub of Pakistan’s terror export machinery. Indian security agencies have recently decoded its structure, exposing the network that fuels violence across the border.
