The Tehrik-e-Taliban Pakistan (TTP) said Sharif has no authority to hold talks and reiterated its demand for the army to pull out from Pakistan's tribal areas, release of its prisoners, and an end to US drone strikes.
"We have already expressed our reservations. The government does not have the authority to hold dialogue. The authority lies with the army or with the US," TTP spokesman Shahidullah Shahid said in an interview to Newsweek.
If the government can somehow take steps to prove that it has the authority to hold talks, then the group will consider initiating a dialogue, he said.
"He is talking about laying down arms and accepting the Constitution. If we were willing to lay down arms and accept the Constitution, there would be no need to have any kind of dialogue."
In an interview with the Wall Street Journal, Sharif had said the Taliban will have to lay down their weapons and accept the Constitution before engaging in a dialogue with his government.