The United States has asked Pakistan to take sustained, verifiable and irreversible action against the perpetrators of terrorism, while warning the country that another terror attack on India will be “extremely problematic”.

“We need to see Pakistan taking concrete and sustained action to rein in the terrorist groups, mainly the Jaish-e-Mohammed and the Lashkar-e-Taiba, in order to ensure that we don’t have re-escalation in the region,” a senior administration official told reporters at the White House on Wednesday.

In the recent days, the official said Pakistan had taken some “initial” actions. They had frozen the assets of some terrorist groups and made some arrests. They had taken administrative control of some of the JeM facilities, the official added.

“But we clearly need to see more. We need to see irreversible action because in the past, what we’ve seen is they made some arrests and then a few months later, they released these individuals. The terrorist leaders are sometimes still allowed to travel around the country, hold rallies,” the official said.

Reiterating that the United States is looking for “irreversible action”, the official said America is working with its international partners to increase pressure on Pakistan. “Because it has been too long that these groups have been able to operate.”

“And if there’s any additional terrorist attack without Pakistan having made a sustained, sincere effort against these groups, it would be extremely problematic for Pakistan and it would cause re-escalation of tensions, which is dangerous for both countries,” the official said on condition of anonymity.

Asked about the steps being taken by Pakistan in the aftermath of the Balakot air strike by Indian fighter jets, the official said the US and the international community needed to see “irreversible and sustained” action against the terror groups.

Pakistan needed to decide if it wanted to be viewed as a responsible international player and have access to all the financial mechanisms that are available or is it going to continue to fail to take the steps necessary against these terrorist groups and see itself further isolated. “The choice is Pakistan’s,” the senior administration official asserted.

While the situation between the two south Asian neighbours had de-escalated, the two armies are still on high alert and that concerned the US, the official said.“So, we realise that if there, God forbid, was another terrorist attack you could quickly see the escalation in the situation once again. So that’s why, we’re making clear that any additional military action by either side runs an unacceptably high risk, for both countries and for the region,” the official said.

The Trump Administration, the official said, had taken sort of a “zero tolerance policy” on the issue of safe havens to terrorists.“The terror attack on February 14 on India was a demonstration that Pakistan’s continuing provision of sanctuary for any terrorist group is not acceptable,” the official said.