The United States of America has issued a stern warning to Pakistan, saying they must take some sustainable, verifiable and irreversible action against the perpetrators of terrorism; also alarming them that another terrorist attack on India would be "extremely problematic".

Suicide attackers of the Pakistan-based JeM terror group stormed a BSF camp with guns and explosives near the Srinagar airport on Tuesday morning, triggering battles that left all three attackers and a trooper dead.

"The clock is ticking" for Jaish-e-Mohammed (JeM) chief Masood Azhar regardless of whether the UN is allowed to act against him or not, India's Permanent Representative Syed Akbaruddin has warned.

India and Japan on Thursday urged Pakistan to bring to justice terrorists who masterminded the 2008 terror attack in Mumbai and the attack on the IAF base at Pathankot in Punjab in 2016.

The US has slammed Pakistan for failing to crackdown on terror groups operating from "safe havens" inside its territory, and said the Nawaz Sharif government did not take any action against the LeT and JeM, which continue to operate openly.

Two suspected Jaish-e-Muhammad (JeM) militants were killed by security forces during an ongoing anti-terror operation in Jammu and Kashmir's Pulwama district on Saturday, while the remaining militants entered a cave in the densely forested area.