ISLAMABAD, Pakistan (CNN) -- At least nine people were wounded in an explosion outside a restaurant in northwestern Pakistan on Friday, police and hospital officials said.

The blast occurred outside a restaurant in Peshawar's Hayatabad neighborhood.
Hayatabad is a mostly residential area in southwest Peshawar, very close to the border with Khyber agency. Khyber is one of seven districts in Pakistan's tribal region along the Afghan border.
CNN's Reza Sayah contributed to this report
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