At least 10 people, including women and children, were killed and three others were injured when a massive fire broke out early Friday at a wooden house in northwest Pakistan, police and rescue workers said.

The incident happened in Kohistan, a district in the Khyber Pakhtunkhwa province, said Taimoor Khan, a provincial disaster management official. He said the deaths were caused by the roof collapsing amid the fire.

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At least 10 people died in a wooden house fire in northwest Pakistan early Friday morning.  (Fox News)

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It was unclear what caused the blaze and police said they were still investigating.

Prime Minister Shahbaz Sharif and other officials have expressed their grief and shock over the incident.