Local officials said on Tuesday that the blast took place in Mir Ali town of North Waziristan, the country’s restive northwestern tribal area bordering Afghanistan.The bomb was planted in a parked motorcycle.
"The casualties came from a bomb planted in a motorcycle parked on a roadside in Khadi market of Mir Ali town," media outlets quoted Kamran Khan Afridi, a senior administration official in the area as saying.
"The blast targeted two vehicles passing along the road. Six people who died and eight who were injured are believed to be the vehicles' passengers," he added
Mir Ali town and neighboring Miranshah, North Waziristan's capital, have long been home to Taliban militants operating across the troubled region.
In a number of assaults in recent weeks, militants have killed several people in the northwest as well as in southwestern Balochistan province.
Last week, gunmen wearing burkas killed several people in an attack on an agriculture institute in the northwestern city of Peshawar.
Despite frequent offensives by the Pakistani army, acts of terror by militant outfits continue to target security forces as well as civilians.
Thousands of Pakistanis have lost their lives in bombings and other militant attacks since 2001, when Pakistan entered into an alliance with the United States in Washington’s so-called war on terror.
Thousands more have been displaced by the wave of violence and militancy sweeping the country.