A mother and daughter polio vaccination team were yesterday gunned down in the southwestern Pakistani city of Quetta as they were immunizing children, police said, the latest deaths in the country's long campaign against the disease.

The duo were killed in a neighbourhood on the outskirts of the city, capital of restive Balochistan, Pakistan's largest and poorest province.

"Sakina Bibi, 38 and her daughter Rizwana Bibi, 16, were killed by unknown assailants while they were administering polio drops to children," senior police official Aitzaz Ahmed Goraya told AFP.

He said the pair were on the fourth day of a five-day anti-polio campaign.

"Previously we used to have police personnel providing security to polio workers but we changed it a few months back as it was drawing attention," Aitzaz said.

"Now we assign polio workers their own neighbourhoods and don't give them security," he added.

The incident was confirmed by a senior administration official Amjad Ali Khan.

Nobody claimed responsibility for the incident but Taliban militants have attacked polio workers in the country in the past. More than a hundred people have been killed in such attacks since December 2012.

immunizing children, police said, the latest deaths in the country's long campaign against the disease.

The duo were killed in a neighbourhood on the outskirts of the city, capital of restive Balochistan, Pakistan's largest and poorest province.

"Sakina Bibi, 38 and her daughter Rizwana Bibi, 16, were killed by unknown assailants while they were administering polio drops to children," senior police official Aitzaz Ahmed Goraya told AFP.

He said the pair were on the fourth day of a five-day anti-polio campaign.

"Previously we used to have police personnel providing security to polio workers but we changed it a few months back as it was drawing attention," Aitzaz said.

"Now we assign polio workers their own neighbourhoods and don't give them security," he added.

The incident was confirmed by a senior administration official Amjad Ali Khan.

Nobody claimed responsibility for the incident but Taliban militants have attacked polio workers in the country in the past. More than a hundred people have been killed in such attacks since December 2012.