The explosive device hidden in a tin was left outside a grocery shop at Rampura Bazaar.
At least five people, including a child, were killed and 29 others injured on Tuesday in a powerful car bomb suicide attack by the Taliban targeting a senior military officer in this restive northwestern Pakistani city.
Imran Khan's Pakistan Tehreek-e-Insaaf party has suffered setbacks in country's biggest ever by-polls for 41 national and provincial assembly constituencies, in which the ruling PML-N appeared to have consolidated its position.
Fired four years ago following allegations of match-fixing, Ejaz Ahmed junior has been controversially appointed head coach of the Pakistan squad for the Asian Emerging Nations Cup, to be held in Karachi and Colombo in December.