The White House retains a list of 20 terrorist groups that it claims are operating in Pakistan and Afghanistan and is believed to have shared this list with Islamabad, the media reported on Thursday.
However, the list was not given to Pakistani authorities by US Secretary of State Rex Tillerson when he visited Islamabad last week, diplomatic sources told Dawn news.
The White House list includes three types of militant groups: those who launch attacks into Afghanistan, those who attack targets inside Pakistan and those who are focused on Kashmir.
Top on the list is the Haqqani Network which, the US claims, has safe havens in the Federally Administered Tribal Areas and uses them to launch attacks into Afghanistan.
Pakistan strongly rejects the charge, saying that there were no such safe havens inside the country.
The US also identified Lashkar-e-Taiba as one of the largest and most active terrorist organisations in South Asia.
The other militant groups in the list include Harakatul Mujahideen, Jaish-e-Mohammed, Jundullah, Lashkar-i-Jhanghvi and Tehreek-i-Taliban Pakistan.