Pakistan mosque blast: Police targeted in attack that kills 59
By Carrie Davies in Peshawar, Laura Gozzi & Malu Cursino in London
At least 59 people have been killed by a bomb that apparently targeted policemen praying in a mosque in Peshawar, Pakistan.
The mosque is within the tightly guarded police headquarters area.
Prime Minister Shehbaz Sharif said "terrorists want to create fear by targeting those who perform the duty of defending Pakistan".
No group has said it carried out the attack, but it has been linked to the Pakistan Taliban.
The group ended a ceasefire in November, and violence has been on the rise since.
In December it targeted a police station - like Peshawar, in the north-west of the country - leading to the deaths of 33 militants.
Early unconfirmed reports said a bomber had blown himself up in the mosque on Monday.
A hospital spokesman told the BBC the death toll stands at 59, while 157 people were injured.
Peshawar police chief Muhammad Ijaz Khan told local media that between 300 and 400 police officers were in the area at the time.
The mosque is in one of the most tightly controlled areas of the city, which includes police headquarters and intelligence and counter-terrorism bureaus.
In a statement, Sharif said those behind the attack "have nothing to do with Islam". He added: "The entire nation is standing united against the menace of terrorism."
The blast took place around 1.30pm local time 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 showed half of a wall caved in. The mosque was covered in bricks and debris as people clambered over the rubble to escape.
A rescue operation is continuing inside the mosque and "more bodies are being taken out," Peshawar city Deputy Commissioner Shafiullah Khan said.
"Currently our priority is to save people buried under the debris," Khan added.
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 couldn't 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.
The prime minister travelled 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 cancelled at the last minute due to bad weather.
On Tuesday, an International Monetary Fund (IMF) delegation is meant to visit Pakistan as part of the process to unlock a bailout loan to prevent the country from defaulting.
Last March, Peshawar was the target of another bombing, which killed dozens in a Shia mosque.
In the capital, Islamabad Police issued a security high-alert and said security at all entry and exit points to the city had been increased.