The provincial government of Nangarhar province in the east of the country where this bomb was dropped, said on Saturday that the latest estimates suggest that the damage inflicted upon the militants is much more than initially believed. A day earlier, the Ministry of Defense (MoD) said 36 Daesh fighters have been killed, and a network of caves and tunnels in the rigid mountainous spot in Achin district were destroyed.
Attaullah Khogyani, spokesman for the Nangarhar government, said an intense clean-up operation has begun in Achin following this attack. He confirmed the latest death toll.
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11:02
At least 90 militants from the Islamic State (IS) group were killed by a huge bomb dropped by the US in Afghanistan, a regional governor says.
The most powerful non-nuclear bomb ever used by the US in combat was dropped on an IS base in Nangarhar province.
A network of tunnels and caves was destroyed on Thursday evening local time, US officials said.
The death toll was confirmed to the BBC by Ismail Shinwary, the governor of Achin province within Nangarhar.
IS had earlier said it had not suffered any casualties in the blast.
No civilians were killed in the explosion, Mr Shinwary said. But one resident close to where the blast happened told the BBC some homes were destroyed.
The explosion lit up the whole night sky, he said.
Known as the "mother of all bombs", or MOAB, the device was dropped on Thursday evening by an MC-130 transport plane, falling in Nangarhar's Achin district.
The Chief Executive of Afghanistan, Abdullah Abdullah, said the attack had been carried out in co-ordination with his government and "great care had been taken to avoid civilian harm".
When IS announced the establishment of its Khorasan branch - an old name for Afghanistan and surrounding areas - in January 2015, it was the first time the group had officially spread outside the Arab world.
"The enemy had created bunkers, tunnels and extensive mine fields, and this weapon was used to reduce those obstacles so that we could continue our offensive in southern Nangarhar," said Gen John Nicholson, the most senior US military commander in Afghanistan.
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14/04/2017
10:05
A colossal US bomb dropped Thursday on ISIS tunnels in eastern Afghanistan killed 36 militants, according to the Afghan Ministry of Defense.
The blast, from the weapon dubbed the "mother of all bombs," destroyed three underground tunnels as well as weapons and ammunition, but no civilians were hurt, said a Defense Ministry spokesman.
US military officials told CNN a GBU-43/B Massive Ordinance Air Blast bomb (MOAB) was dropped on ISIS positions in Nangarhar province, near the Pakistan border.
Capable of destroying an area equivalent to nine city blocks, the 30-foot-long, 21,600-pound bomb is the most powerful non-nuclear weapon the US has in its arsenal. It's the first time it's ever been used in conflict.
A local resident living around two kilometers (1.5 miles) from the blast told CNN he heard an "extremely loud boom that smashed the windows of our house."
"We were all scared and my children and my wife were crying. We thought it had happened right in front of our house," he said.
Officials said ISIS, which has expanded into Afghanistan in recent years, was using a complex of caves and tunnels that were mined and fortified against conventional attack.
US President Donald Trump said Thursday the bombing was "another successful job." It is the third major military action his administration has taken in recent months, following a military raid in Yemen that left civilians and a US Marine dead, and last week's surprise strike on a Syrian airfield.
Afghanistan's ambassador to the US, Hamdullah Mohib, said the colossal MOAB was dropped after fighting had intensified over the last week. US and Afghan forces had been unable to advance because ISIS had mined the area with explosives.
Target
The ISIS positions hit by the MOAB are in Nangarhar province's Achin district, a sparsely-populated area where 600 to 800 fighters are thought to operate, according to the US military.
Locals told CNN that more than 3,000 families had fled the district in the past year or so since the militant group established its presence.
One man, who did not want to give his name for fear of ISIS retaliation, said there were no civilians left in the area the group controlled.
The region the MOAB struck butts up against the porous Pakistan border. The rocky landscape is dotted with caves and defensive tunnels, making it easy to hold and hard to attack, according to CNN International's diplomatic editor Nic Robertson, who has previously reported from the Afghan mountains.
Support
On Twitter, Afghanistan President Ashraf Ghani approved of the strike, saying it was "designed to support the efforts of the Afghan National Security Forces (ANSF) and US forces ... conducting clearance operations in the region."
"Precautions were taken to avoid civilian casualties with this air strike," Ghani said.
Multiple Afghan officials previously told CNN they had no information about the bombing before it happened. A spokesman for the country's Ministry of Defense later said the bombing was carried out "in coordination" with Afghan military forces.
US State Department spokesman Mark Toner said Washington is "working with the government of Afghanistan and our partners in the region in order to deny any terrorist organization -- that includes al Qaeda as well -- a safe haven or any kind of material support on the ground."
Ongoing conflict
While the war in Afghanistan has largely slipped from public consciousness in the US, replaced by the conflict in Syria and ongoing tensions over North Korea, there are still around 8,400 US troops in the country engaged in counter terrorism operations.
Those troops are separate to a wider NATO-led effort to train, advise and assist the Afghan army and police force.
Testifying before the Senate Armed Services Committee in February, General John Nicholson warned of a stalemate in the country. He told US lawmakers the current troop level was insufficient and there was a "shortfall of a few thousand" advisers to train the Afghans.
According to CNN national security analyst Peter Bergen, "the war in Afghanistan is at its lowest point for the Afghans and their American allies since the Taliban were overthrown in the months after 9/11."
The Taliban "control or contest" about a third of the population of the country, Bergen said, citing senior US military officials. That's around 10 million people -- more than the population ISIS controlled in Syria and Iraq at the height of its power during the summer of 2014, he added.
First MOAB strike
This is the first time a MOAB has been used in the battlefield, according to the US officials. The munition was developed during the Iraq war and is an air blast-type warhead that explodes before hitting the ground in order to project a massive blast to all sides.
During the final stages of testing in 2003, military officials told CNN that the MOAB was mainly conceived as a weapon employed for "psychological operations."
Military officials said they hoped the MOAB would create such a huge blast that it would rattle Iraqi troops and pressure them into surrendering or not even fighting.
As originally conceived, the MOAB was to be used against large formations of troops and equipment or hardened above-ground bunkers. The target set has also been expanded to include targets buried under softer surfaces, like caves or tunnels.
New Trump foreign policy?
The Afghanistan bombing, along with the intervention in Syria last week, mark a dramatic change in attitude for Trump, who advocated an isolationist, America-first foreign policy during his election campaign.
He once said the invasion of Afghanistan was a mistake, though he later walked back that statement, saying that he "always supported" US involvement in the country.
As a candidate he was also highly skeptical of NATO, but side-by-side with the alliance's Secretary General Jens Stoltenberg this week, he took the opposite tack.
"The Secretary General and I had a productive discussion about what more NATO can do in the fight against terrorism," Trump said. "I complained about that a long time ago and they made a change, and now they do fight terrorism. I said it was obsolete; it's no longer obsolete."
While Trump's newfound interventionist attitude was welcomed by hawks in his own party and even some opposition figures, Democrat Representative Jackie Speier voiced concerns over increasing US military involvement in Afghanistan following Thursday's bombing.
"We are escalating in an area I think we should be deescalating in," she told CNN's Wolf Blitzer.
"Coupled with what happened in Yemen, what happened in Syria, these are efforts that are made to suggest that we will be engaging in wars in three different countries simultaneously."
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