Pakistan Taliban chief Baitullah Mehsud died this month after a US missile strike, his successor Hakimullah Mehsud confirmed Tuesday, vowing revenge on the United States for the attack.
Hakimullah Mehsud also declared himself the new leader of the insurgent group blamed for hundreds of deaths in attacks across Pakistan.
A missile from a US drone aircraft hit the home of Baitullah Mehsud's father-in-law on August 5, and US and Pakistani officials have for weeks been saying they believe the feared warlord was killed.
Taliban officials had until Tuesday denied their leader's demise, as officials and analysts said fierce infighting had broken out among their ranks over who would succeed him as leader of the Tehreek-e-Taliban Pakistan (TTP).
Disputing the US and Pakistani version of events, the Taliban said Baitullah Mehsud had survived until August 23.
"Baitullah Mehsud was injured in a drone attack and died on Sunday afternoon," Hakimullah Mehsud, a top aide to Baitullah Mehsud, told AFP by telephone from an undisclosed location.
"He remained unconscious after being seriously injured in a drone attack and died on Sunday. Now the shura (meeting of elders) has unanimously appointed me as new amir (head) of Tehreek-e-Taliban," Hakimullah Mehsud said.
"We will take revenge and soon. We will give our reply to this drone attack to America. The effects of our attack will go up to Washington," he added.
A TTP deputy had already named Hakimullah Mehsud as the chosen successor, but government officials and analysts cast doubt on the announcement, saying other factions were rooting for another rebel commander, Wali-ur Rehman.
Hakimullah Mehsud said Rehman had been named Taliban chief for the main insurgent stronghold of South Waziristan.
"All of the Taliban are united. The news about the differences and fighting are baseless and those spreading such type of news will face failure," he said.
Rehman was not immediately available for comment on Tuesday.