At least six Frontier Constabulary (FC) personnel and a child were injured in two consecutive explosions at the Pak-Afghan border at Torkham, security officials said on Friday.
"The strike took place near the border with Afghanistan", said Basir Khan, the senior official in the Kurram agency agency in the Federally Administered Tribal Areas.
Interior Ministry spokesperson Najib Danesh said two policemen and one civilian were killed and five people wounded.
USA drone attacks inside Pakistan have become infrequent over the past few years.
Surprisingly, the announcement was not made public by the Emarat Islami Afghanistan, the official name of the Afghan Taliban, and was released by Maulana Samiul Haq, chief of his own faction of the Jamiat Ulema-i-Islam, from Akora Khattak where he runs his madressah, the report said. "It was not clear how those religious leaders are different from the Afghan Taliban", the Dawn said.
He said the "U.S. must comply with worldwide law when it comes to the use of lethal force and any potentially unlawful strikes should be independently investigated".
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The CIA-run drone operation resumed in Pakistan in March after a nine month unannounced break, but there have been no confirmed strikes since June 13, according to the Bureau of Investigative Journalism which tracks the US global drone program. He said he would prolong U.S. military intervention in Afghanistan, ordering added forces in the region. Islamabad, however, denies there are any militants on its side.
In his policy speech, Trump singled out Pakistan for providing a safe haven for terrorist groups.
Later, the report added, they sent a written statement to Maulana Haq, extending full support to Pakistan in case of an attack by the USA or India.
The United States, under the presidency of Republican George W. Bush, and its allies invaded Afghanistan on October 7, 2001 as part of Washington's so-called war on terror.
Cricket fans in Afghanistan have a record number of foreign players to watch in the ongoing Shpageeza Cricket League despite security concerns.