A Taliban suicide bomber has detonated a vehicle packed with explosives outside the house of a senior police official in Pakistan's southern city of Karachi, killing at least eight people.

Monday's attack killed six police officers guarding the police official's house. A teacher and her son, who were passing by, were also killed in the blast.

The Pakistan Taliban claimed responsibility for the bombing, which targeted Senior Superintendent of Police Chaudhry Aslam.

Aslam escaped unharmed and later told reporters that he will not be deterred by Monday's “cowardly act.”

The senior police official added that he is not scared of the Taliban and will “teach them a lesson.”

Aslam heads the counter-terrorism unit in Karachi, which investigates militant groups. He says he has received threats from the Pakistani Taliban in the past.

The Taliban said it targeted Aslam because he had detained and killed many of the militant group's fighters.

Pakistani Taliban spokesman Ahsanullah Ahsan said the militant group will “continue targeting” officers who are “involved in the killing of our comrades.” Ahsan told the French News Agency that Aslam is still on “our hit list.”

In a separate attack, at least two people were killed Monday when a bomb exploded at a market in the northwestern city of Peshawar. Police say more than 19 others were wounded in the blast, which struck shops selling CDs.

Police said more than 300 kilograms of explosives were used in Monday's suicide bombing in Karachi.

The blast badly damaged Aslam's house and neighboring homes and left a two-meter deep crater. The scene of the bombing was strewn with cement blocks, car parts, and other debris.