KABUL: Afghanistan's Acting Defense Minister Mohammad Yaqoob Mujahid on Sunday accused Pakistan of providing airspace for United States drones to enter his country, calling the incursions a continuation of Washington's "invasion" of the South Asian nation.

Mujahid's comments came less than a month after US President Joe Biden announced the killing of Al-Qaida chief Ayman al-Zawahiri in a drone strike in the Afghan capital Kabul.

US drones can still be seen flying over Kabul even now, according to Mujahid.

"Our information shows that they (US drones) are entering into Afghanistan from Pakistan, using the airspace of Pakistan," Mujahid told reporters when asked where the drones were coming from.

"We demand that Pakistan should not allow its airspace to be used against us," he said.

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Pakistan's foreign ministry called the "conjectural allegations...highly regrettable" in a statement on Sunday night and said Afghanistan must abide by its commitments "not to allow the use of its territory for terrorism against any country."

The Pakistani military has previously denied allowing the country's airspace to be used, most recently over the Zawahiri case.

Deploying these drones into Afghanistan is "still a clear invasion of Afghanistan and its airspace by the Americans," Mujahid said. "They are doing this shamelessly. We condemn this illegal act and demand that the Americans put an end to it."

The US led an invasion of Afghanistan in 2001 that toppled the first Taliban government, after the hardline Islamist group refused to hand over the late Al-Qaida founder Osama bin Laden following the September 11 attacks in New York City and Washington, D.C.

The drone attack in July that killed Zawahiri, bin Laden's successor, was Washington's first known strike on a target in Afghanistan since it withdrew its forces from the country on August 31 last year.

Mujahid said the authorities were investigating Biden's claims of killing Zawahiri, adding that "we will share the details when it is complete."

Officials have neither confirmed Zawahiri's presence in Afghanistan nor acknowledged his death.

Border tensions between Pakistan and Afghanistan have risen since the Taliban seized power on Aug. 15, 2021, with Islamabad claiming militant groups are carrying out regular attacks on its neighbor.

The Taliban government denies harboring Pakistani militants but is also infuriated by a fence Islamabad is erecting along their 2,700-kilometer (1,600-mile) border known as the Durand line, which was drawn up in colonial times. AFPTies between the two countries were further strained when Pakistani military air strikes in eastern Afghanistan killed and wounded dozens of people in April.