A senior Pakistani security official said on Monday he could not confirm a media report that Taliban leader Mullah Omar had been killed. And an Afghan Taliban spokesman said Monday it was "not possible at all" that their leader Mullah Omar was dead, after an Afghan intelligence source said he had been killed in Pakistan. "I am making queries," the official said, requesting anonymity. "I can't confirm it," the senior Pakistani security official said. On Monday, Afghanistan's privately owned TOLO television reported Omar had been killed in Pakistan, while on the way from Quetta to North Waziristan. There was no immediate comment from the Taliban. The Xinhua news agency reported earlier on Monday that Omar “was killed on way from Quetta to North Waziristan.” However, it did not provide details on how he was killed and by whom. It quoted an Afghan security official as saying: "it is correct that Mullah Omar has been killed". But he did not disclose details.