Security officials examine the attack site in southern Pakistani port city of Karachi on June 29, 2020. Four militants and five security personnel were killed in a terrorist attack on the Pakistan Stock Exchange building in southern port city of Karachi on Monday, police said. (Photos: Xinhua)

A damaged car is seen at the attack site in southern Pakistani port city of Karachi on June 29, 2020. Four militants and five security personnel were killed in a terrorist attack on the Pakistan Stock Exchange building in southern port city of Karachi on Monday, police said.

Security officials cordon off the attack site in southern Pakistani port city of Karachi on June 29, 2020. Four militants and five security personnel were killed in a terrorist attack on the Pakistan Stock Exchange building in southern port city of Karachi on Monday, police said.

Security officials arrive at the attack site in southern Pakistani port city of Karachi on June 29, 2020. Four militants and five security personnel were killed in a terrorist attack on the Pakistan Stock Exchange building in southern port city of Karachi on Monday, police said.

Security officials examine a damaged car at the attack site in southern Pakistani port city of Karachi on June 29, 2020. Four militants and five security personnel were killed in a terrorist attack on the Pakistan Stock Exchange building in southern port city of Karachi on Monday, police said.

Security officials examine the attack site in southern Pakistani port city of Karachi on June 29, 2020. Four militants and five security personnel were killed in a terrorist attack on the Pakistan Stock Exchange building in southern port city of Karachi on Monday, police said.

Security officials examine the attack site in southern Pakistani port city of Karachi on June 29, 2020. Four militants and five security personnel were killed in a terrorist attack on the Pakistan Stock Exchange building in southern port city of Karachi on Monday, police said.