People gather at an attack site in Pakistan's southern port city of Karachi, on Aug. 5, 2020. A hand grenade attack at a rally on Wednesday evening in Karachi left five people injured, police and local media said. (Photos: Str/Xinhua)

Security members examine an attack site in Pakistan's southern port city of Karachi, on Aug. 5, 2020. A hand grenade attack at a rally on Wednesday evening in Karachi left five people injured, police and local media said.

Security members examine an attack site in Pakistan's southern port city of Karachi, on Aug. 5, 2020. A hand grenade attack at a rally on Wednesday evening in Karachi left five people injured, police and local media said.

Security members cordon off an attack site in Pakistan's southern port city of Karachi, on Aug. 5, 2020. A hand grenade attack at a rally on Wednesday evening in Karachi left five people injured, police and local media said.

People carry an injured man at an attack site in Pakistan's southern port city of Karachi, on Aug. 5, 2020. A hand grenade attack at a rally on Wednesday evening in Karachi left five people injured, police and local media said.

Security members cordon off an attack site in Pakistan's southern port city of Karachi, on Aug. 5, 2020. A hand grenade attack at a rally on Wednesday evening in Karachi left five people injured, police and local media said.