Live Desk: At least 62 people were killed by a blast inside an Afghan mosque during Friday prayers, according to officials, a day after the United Nations said violence in the country had reached "unacceptable" levels.

The explosion, which witnesses said collapsed the mosque's roof, took place in eastern Nangarhar province and also wounded at least 33 people, provincial governor spokesman Attaullah Khogyani told AFP.

A Taliban spokesman called the attack a "major crime", apparently denying responsibility and blaming it on the Islamic State group or government forces.The attack occurred in Haska Mina district, about 50 kilometres (30 miles) from the provincial capital Jalalabad.

Witnesses said the roof of the mosque had fallen through after the "loud" explosion, the nature of which was not immediately clear. Some 350 worshippers were inside at the time, local resident Omar Ghorzang told AFP.

"Dozens of people were killed and wounded and were taken in several ambulances," Haji Amanat Khan, a 65-year-old local resident, told AFP.

The blast came after the UN released a new report on Thursday saying an "unprecedented" number of civilians were killed or wounded in Afghanistan from July to September.

The report, which also charts violence throughout 2019 so far, underscores how "Afghans have been exposed to extreme levels of violence for many years" despite promises by all sides to "prevent and mitigate harm to civilians".

It also noted the absurdity of the ever-increasing price paid by civilians given the widespread belief that the war in Afghanistan cannot be won by either side.

"Civilian casualties are totally unacceptable," said the UN's special representative in Afghanistan, Tadamichi Yamamoto, adding they demonstrate the importance of talks leading to a ceasefire and a permanent political settlement.

The figures -- 1,174 deaths and 3,139 injured from July 1 until September 30 -- represent a 42 percent increase compared to the same period last year.

The UN laid most of the blame for the spike at the feet of "anti-government elements" such as the Taliban, who have been carrying out a bloody insurgency in Afghanistan for more than 18 years.

July alone saw more casualties than in any other month on record since the United Nations Assistance Mission in Afghanistan (UNAMA) began documenting the violence in 2009. The first six months of 2019 had seen casualties drop slightly compared to previous years.

But the violence has surged so far in the third quarter that it yanked the overall total for the year back on par with the bloodiest since NATO withdrew its combat forces at the end of 2014.

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Dhaka 18 October (campuslive24.com)//Az