The blast in the capital of Balochistan province also wounded 35 people. Officials say the death toll could rise as some wounded were reported to be in critical condition.
Powerful blast claimed by Daesh also kills senior police officer, wounds 20 others in southwest Quetta city, officials say.
Pakistan, Afghanistan and Nigeria are the only countries in the world, where polio is endemic. And in contrast to recent years of gradual improvement, this year there have been at least 72 cases of polio in Pakistan after only eight in 2018.
Pakistani police said that a powerful bomb went off inside a mosque during Friday prayers on the outskirts of the southwestern city of Quetta, killing at least five worshippers and wounding dozens.
An explosive rigged motorcycle was detonated to target a police van parked outside the police station in the heart of Quetta’s busy shopping area, the city police chief said.
The explosion that wounded more than a dozen people, occurred at a mosque on the outskirts of Balochistan province's capital, Quetta during Friday prayers. The bomb was remotely detonated , according to a police official.
Most of the victims belong to the Shia Hazara minority, which has been similarly targeted in the past.
How the city's persecuted minority survives the trauma caused by extremist militant groups who target them for practising their faith.
Suicide bombers struck a police vehicle and a security checkpoint in separate attacks in the Pakistani city of Quetta, killing six police and wounding 15 members of the security forces.
A Pakistani mother and daughter were killed in the country's southwestern city of Quetta. There was no immediate claim of responsibility for the attack.
Officials say a suicide bomber rammed into ta police bus, killing five policemen and two civilians and injuring 23 people near the legislative assembly of southwestern Balochistan province, of which Quetta is the capital.
The blast ripped through the truck carrying police recruits, five of whom were killed along with two passers-by, in southwestern city of Quetta, officials say.
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