India looking at all strategic and security options

"As with the recent extradition of Tahawwur Rana, India will be unrelenting in the pursuit of those who have committed acts of terror, or conspired to make them possible," Misri said.

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The Resistance Front, a shadow group of the banned Pakistan-based Lashkar-e-Taiba (LeT) terror outfit, has allegedly claimed responsibility for the attack.

Official sources said India was looking at all strategic and security options in response to the terror attack in the Baisaran meadow near Pahalgam in Anantnag district of J&K. The Indus Water Treaty wasn't suspended during the 1965 and 1971 India-Pakistan wars, as well as the Kargil conflict of 1998 between the two neighbours.

The CCS also noted that the "attack came in the wake of the successful holding of elections in the Union Territory of J&K and its steady progress towards economic growth and development," Misri said. The CCS directed all forces to maintain high vigil. Officials in the security establishment said that a realignment of the security forces was also required ahead of the annual Amarnath pilgrimage, which begins on July 3.