Mehsud was killed in a drone strike in North Waziristan, located near the border with Afghanistan, the group said in a statement, the BBC reported. "The vehicle was completely destroyed", an intelligence official told the Pakistani publication.
Pakistani Taliban confirmed on Monday that its senior commander was killed in a USA drone strike in the country's North Waziristan tribal region last week and said they had appointed a new deputy to take his place.
Wali, like his predecessor, would lead militants in South Waziristan, a rugged mountainous region on the Afghan border which has always been home to Pakistani, Afghan and al Qaeda-linked foreign militants.More news: Luger Emily Sweeney Knocked out of Winter Olympics After Frightening Crash
Tariq says Wali enjoys the backing of Mullah Fazlullah, the leader of the Pakistani Taliban who is believed to be hiding in Afghanistan.
Militant sources said Wali, known by the nickname Ghar Starga, is a ruthless leader with experience working in Pakistani urban areas including the southern city of Karachi.
According to reports, Sajna's death is a major blow to the group, which is blamed for most of the terrorist attacks in Pakistan.
Pakistani officials have been critical of the American drone strikes on the Pakistani soil, arguing that they are a violation of the country's sovereignty. Islamabad denies charges that it harbors militants.
But Mondays' budget requests endorse a State Department announced last week that U.S. security assistance to Islamabad could be resumed if Islamabad took the required action against militants.