Afghan Taliban leader Mullah Mohammad Omar has been killed in Pakistan, Xinhua cited a private television channel as stating on Monday.
"Mullah Omar was killed on way from Quetta to North Waziristan," Afghanistan's TOLO television stated.
However, it did not provide details on how he was killed and by whom.
Meanwhile, a security official confirmed the killing, saying: "It is correct that Mullah Omar has been killed."
But he did not disclose details.
Omar was considered the spiritual leader of the Taliban movement that operates in parts of Afghanistan and Pakistan.
He was Afghanistan's de facto head of state from 1996 to late 2001 and had the title "Head of the Supreme Council".
However, the Taliban in Afghanistan rejected the unsourced media reports that its leader, Mullah Mohammad Omar, had been killed in Pakistan, saying he is alive and in Afghanistan.
"He is in Afghanistan safe and sound," Taliban spokesman Zabihullah Mujahid told Reuters by telephone from an undisclosed location.
"We reject these baseless reports that Mullah Mohammad Omar has been killed."