The "suicide attack carried by a bomber" occurred on Tuesday near National Database and Registration Authority (Nadra) office in Mardan city, Dawn online quoted Deputy Inspector General (Mardan division) Saeed Wazir as saying.
A security guard posted at the office stopped the bomber at the gate after which he detonated his suicide vest, the DIG said.
The toll was expected to rise further as a large number of people were critically injured, the official said.
A Mardan district police officer said it was too early to determine the nature of the blast.
Earlier on Dec 15, atleast 15 people were killed in a bomb blast in bustling Sadar market of Parachinar cantonment in Khurram Valley, a cantonment in tribal region of Pakistan.
Blast at government office in Pakistan kills 12
29 December 2015
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At least 12 people were killed and 25 others were injured in a blast at a government office in Pakistan`s Khyber Pakhtunkhwa province.
