QUETTA, Pakistan (AFP) — Taliban supremo Mullah Akhtar Mansour was killed in a US drone attack in Pakistan, senior militant sources told AFP yesterday, adding that an insurgent assembly was underway to decide on his successor.

Saturday’s bombing raid, the first known US assault on a top Afghan Taliban leader on Pakistani soil, marks a major blow to the militant movement which saw a new resurgence under Mansour.

The elimination of Mansour, who rose to the rank of leader nine months earlier after a bitter internal leadership struggle, could also scupper any immediate prospect of peace talks.

“I can say with good authority that Mullah Mansour is no more,” a senior Taliban source told AFP.

Mansour’s death, which risks igniting new succession battles within the fractious group, was confirmed by two other senior figures who said its top leaders were gathering in Quetta to name their future chief.

The Taliban sources said that Sirajuddin Haqqani, leader of the dreaded Haqqani network and one of Mansour’s deputies, was among the front-runners, adding that Mullah Abdul Ghani Baradar was also in contention.

Both figures are said to be close to the Pakistani military establishment which has historically nurtured and supported the Taliban.

The Taliban have not commented officially on Mansour’s death or the leadership succession.

US officials had said they had no definitive proof of his death in multiple drone strikes, authorised by President Barack Obama, in the remote Pakistani town of Ahmad Wal in Balochistan province.

But both Afghanistan’s main spy agency and the country’s Chief Executive Abdullah Abdullah asserted that Mansour had been killed in the attack.

“Mansour was being closely monitored for a while… until he was targeted along with other fighters aboard a vehicle,” Afghanistan’s National Directorate of Security said in a statement.

Pakistan yesterday lambasted the US over the drone attack, calling it a violation of its sovereignty and asserting that information about it was shared with its prime minister and army chief only after the raid.

Pakistani security officials said they recovered two bodies charred beyond recognition from a smouldering vehicle at the scene of the attack.

The passenger, suspected to have been Mansour, was said to be returning from Iran and was using a Pakistani passport in the name of Muhammad Wali.

The driver who also died in Saturday’s attack was a civilian who worked for a local car rental company, according to the officials, contradicting the US account that he was a “second combatant”.

Mansour was formally appointed head of the Taliban in July last year following the revelation that the group’s founder, Mullah Omar, had been dead for two years.

The group saw striking military victories under the firebrand supremo, helping to cement his authority by burnishing his credentials as a commander.

The Taliban briefly captured the strategic northern city of Kunduz last September in their most spectacular victory since they were toppled from power in 2001.

The southern opium-rich province of Helmand is also almost entirely under insurgent control.

“Mansour posed… an imminent threat to US personnel, Afghan civilians and Afghan security forces,” US Secretary of State John Kerry said during a visit to Myanmar Sunday.

“He was also directly opposed to peace negotiations.”

But Mansour’s death was not immediately seen as likely to push the Taliban closer to peace talks. It could press them to show they are still able to wage an aggressive battle, observers say.