ISLAMABAD — The death toll from a suspected suicide bomb that ripped through a mosque in northwestern Pakistan Monday has risen to at least 92, marking one of the deadliest attacks in the country in years as it faces what one analyst described as “a national security crisis.”

Peshawar deputy commissioner Shafiullah Khan on Tuesday confirmed the fatalities and said more than 80 victims were still being treated in hospital following the blast at the mosque in a police compound in the city.

The mosque is within a high-security police headquarters area and a probe is underway into how the bomber got in.

Hope was fading in the search for survivors as rescue workers sifted through the rubble of the mosque that was all but destroyed Monday, when worshippers – mainly law enforcement officials – had gathered for afternoon prayers.

Photos and video show walls of the mosque reduced to fragments, with glass windows and paneling destroyed in the powerful blast.

“We are not expecting anyone alive to be found. Mostly dead bodies are being recovered,” Bilal Faizi, a rescue spokesperson, said Tuesday.

The BBC saw ambulances racing in and out of the compound every few minutes.

Meanwhile, funerals have been carried out for more than 20 police officers, their coffins draped with the Pakistan flag.

"Terrorists want to create fear by targeting those who perform the duty of defending Pakistan," Prime Minister Shehbaz Sharif said. He added: "The entire nation is standing united against the menace of terrorism."

The Pakistani Taliban denied involvement after an initial claim by one of its commanders. The group ended a ceasefire in November, and violence has been on the rise since.

Between 300 and 400 police officers were in the area at the time, Peshawar Police Chief Mohammad Aijaz Khan told local media.

In a statement to CNN earlier, Khan said the incident inside the Police Lines Mosque was “probably a suicide attack,” echoing Prime Minister Sharif.

“The brutal killing of Muslims prostrating before Allah is against the teachings of the Qur'an,” Sharif said in a statement, adding that “targeting the House of Allah is proof that the attackers have nothing to do with Islam.”a

A “comprehensive strategy” is in the works in order to restore law and order in the northwest Khyber Pakhtunkhwa province, where Peshawar is located, Sharif also said.

The mosque is in one of the most heavily controlled areas of the city, which includes police headquarters and intelligence and counter-terrorism bureaus.

The blast took place around 13:30 (08:30 GMT) during afternoon prayers in the north-western city, near the country's border with Afghanistan.

A video circulating on social media and verified by the BBC shows that half of a wall caved in. The mosque was covered in bricks and debris as people clambered over the rubble to escape.

Hours after the blast, BBC News witnessed a facility full of the injured, many still wearing their police uniforms.

Some were covered in burns cream, their skin red with burns from the explosion. Others have broken bones from being hit by falling rubble.

One man said he still could not hear because of the sound of the blast. Another man said he had been rescued after being trapped under the rubble for almost an hour.

Nasarullah Khan, a police official who survived the explosion, said he remembered seeing “a huge burst of flames” before becoming surrounded by a plume of black dust.

Khan said his foot broke in the blast and he was stuck in the rubble for three hours.

“The ceiling fell in... the space in between the ceiling and wall is where I managed to survive,” he said.

The prime minister traveled to Peshawar on an emergency visit, where he will be briefed by local officials and visit those wounded by the blast.

UN Secretary General António Guterres condemned the attack, with his spokeswoman saying: "It is particularly abhorrent that such an attack occurred at a place of worship."

The attack on the mosque took place at the start of a key week for Pakistani diplomacy.

On Monday, the president of the United Arab Emirates, Mohamed bin Zayed Al Nahyan, was due to visit Islamabad — although the trip was canceled at the last minute because of bad weather.

On Tuesday, an International Monetary Fund delegation is meant to visit Pakistan as part of the process to unlock a bailout loan to prevent the country from defaulting.

In the capital Islamabad, police issued a high alert and said security at all entry and exit points to the city had been increased.

Siddique Khan, a police official, said the attacker blew himself up while among the worshippers. Authorities said 27 of the dead were police officials.

Sarbakaf Mohmand, a commander for the Pakistan Taliban (Tehreek-e-Taliban, or TTP), initially claimed responsibility for the attack on Twitter.

But hours later, TTP spokesperson Mohammad Khurasani distanced the group from the bombing, saying it was not its policy to target mosques, seminaries and religious places. His did not address why a TTP commander had claimed responsibility for the bombing.

“Tehreek-e-Taliban has nothing to do with this attack,” a TTP statement said.

Former Pakistan Prime Minister Imran Khan took to Twitter to denounce the bombing.

“Strongly condemn the terrorist suicide attack in police lines mosque Peshawar during prayers,” he tweeted.

“It is imperative we improve our intelligence gathering and properly equip our police forces to combat the growing threat of terrorism.”

Peshawar, the capital of the Khyber Pakhtunkhwa province bordering Afghanistan, has experienced frequent attacks.

Last March, a suicide bomber targeted a mosque there, killing 64 in Pakistan’s deadliest attack since 2018. The Islamic State in Khorasan Province, ISKP (ISIS-K) claimed responsibility for the bombing.

Pakistan has seen a surge in violence during the last year, with numerous attacks on law enforcement officials, particularly in the Khyber Pakhtunkhwa province as well as the southern province of Balochistan.

In November last year, the TTP, which has been waging a rebellion against Pakistan for more than a decade, unilaterally ended a ceasefire with the Pakistani state.

In 2022 alone, Pakistan’s monitoring agencies recorded more than 150 attacks launched by the TTP – a group ideologically aligned with the Afghan Taliban – that struck across the country and killed dozens of people.

Authorities fear the return to power of the Taliban in Afghanistan has emboldened the TTP and led to its resurgence.

The group demands the imposition of their hardline interpretation of Islamic law, the release of their members arrested by the government, and a reversal of the merger of Pakistan’s tribal areas with Khyber Pakhtunkhwa province. — Agencies