Holding that India faces a "daunting challenge" from these Pakistan-based terror groups and hailing New Delhi's efforts to deal with the menace, the envoy said the world needs India's leadership in countering terrorism.
Verma, who demits office ahead of Donald Trump's inauguration on Friday, said the US also told the Pakistani leadership to come down hard on perpetrators of cross-border terrorism including in Afghanistan.
Asked about what exactly the Obama administration told Pakistan recently regarding Lashkar-e-Taiba, Jaish-e-Mohammed and Haqqani network, Verma told an event organised by a think tank, "We have taken a very tough line on these terrorist groups operating from Pakistani soil."
He said the message to the Pakistani leadership has been a "very tough and concerted" one, adding Islamabad has been told to eliminate the safe havens of the terrorist groups, shut down their cross border activities and take action against the perpetrators of terror.
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He said the US continued to press Pakistan at the "highest level" to take effective action against these groups and cited extension of terrorist designation to two more LeT leaders.
The envoy said India and the US must expand cooperation further in dealing with terror, radicalisation and violent extremism. "The US India partnership stands as a global example of what is possible."
Complimenting India for its efforts to contain insurgency in the northeastern states, particularly Mizoram, he said it can be a lesson in dealing with broader challenge of violent extremism in various parts of the globe.
Noting that social media has become a key platform for ISIS to lure young people into terrorism, he said efforts and resources must be mobilised locally and globally in fight against terror and violent extremism. He said ISIS had recruited a around 40,000 people over the last 4 years.
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