The Taliban on Thursday said the government had no information about al Qaida leader Ayman al-Zawahiri “entering and living” in Kabul and warned the US to never repeat an attack on Afghan soil.

The US killed Zawahiri with a missile fired from a drone while he stood on a balcony at his Kabul hideout on Sunday, US officials said, in the biggest blow to the militants since US Navy SEALS shot dead Osama bin Laden more than a decade ago.

“The government and the leadership weren’t aware of what is being claimed, nor any trace there,” Suhail Shaheen, the designated Taliban representative to the UN, who is based in Doha, said in a statement. “Investigation is underway now to find out about the veracity of the claim,” he said, adding that the results of the investigation would be shared publicly. Taliban leaders have remained largely tight-lipped about the Sunday drone strike and have not confirmed the presence or death of Zawahiri in Kabul.

Referring to the drone strike, the Taliban said “if such incidents are repeated again and if the territory of Afghanistan is violated then responsibility for any consequences will be on the United States.”

Top Taliban leaders have been holding lengthy discussions about how to respond to the US drone strike, three sources in the group said. How the Taliban react could have significant repercussions as the group seeks international legitimacy and access to billions of dollars in frozen funds, following their defeat of a US-backed government a year ago. Zawahiri, an Egyptian doctor, was closely involved in September 11, 2001, attacks and was one of the world’s most wanted men.

His death in Kabul raises questions about whether he received sanctuary from the Taliban, who had assured the United States as part of a 2020 agreement on the withdrawal of US-led forces that they would not harbour other militant groups. Shaheen said the Islamic Emirate of Afghanistan — the name the Taliban use for the country — was committed to the agreement, signed in Doha. US secretary of state Antony Blinken said the Taliban had “grossly violated” the agreement by sheltering Zawahir.