Related readings:  Taliban leader Mullah Omar killed in Pakistan  Taliban claim responsibility for Pakistani naval base attack

ISLAMABAD - A senior Pakistani security official said on Monday he could not confirm a media report that Taliban leader Mullah Omar had been killed.

"I am making queries," the official said, requesting anonymity. "I can't confirm it."

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.