The attack took place in the the posh Super Market, near Shaheen store in sector F-6, close to the centre of Islamabad and police said it was caused by a suspected suicide bomber, The Express Tribune reported.
"Officials from the Kohsar police station said that a local security guard at the super market had intercepted a suspicious person just before the blast...He (security guard) was shifted to the Polyclinic hospital," the Tribune said.
There were also reports of a second blast in a car near Karachi Company in G-9 Markaz. However, no injuries were reported, the daily said.
The incident comes after recent air strikes by the Pakistani military against militant hideouts which killed at least 75 people, according to reports.
A month-long ceasefire between Pakistan and the Taliban, who have waged a seven-year insurgency, expired last month.
