"The time has come for all humanitarian forces to join together to resolve the problem of terrorism," he said.
His comments came on a day when more than 40 world leaders marched through Paris to rally for unity and freedom of expression and to honour 17 victims of three days of terrorist attacks, including on satirical magazine Charlie Hebdo's office.
Emphasizing the need for zero tolerance on terrorism, Modi said "this required political will" and added that "products should reach the needy and not terrorists."
The Prime Minister also discussed counter-terror co-operation with senior leaders of US and Canada visiting India for the Summit.
In his meeting with US Secretary of State John Kerry, discussions focused issues like counter-terror co-operation, besides the upcoming visit of US President Barack Obama and other matters.
Counter-terror co-operation was also a key theme in the Prime Minister's meeting with Canada's Minister of Citizenship and Immigration Chris Alexander.
Earlier in the day in his speech at the Summit, Modi had expressed solidarity with the people of France as they mourn their loss and come to terms with the brutal terrorist attack.
"As we see it spread around the world, let us pledge to work together to make sure that it will not succeed against the life that we have all gathered here to build, and the values that we stand for," he said.
John Kerry in his speech said, “No act of terror will ever stop the march of freedom and the entire world is with the people of France."

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