At least three paramilitary soldiers were killed on Saturday after terrorists attacked a Pakistan Rangers headquarters in Karachi’s heavily populated Gulistan-e-Jauhar area, the police said.Initial investigations suggested the terrorists entered the compound by ramming the main gate, said Sindh Inspector General of Police Javed Alam Odho. Rangers personnel responded rapidly but three of them were killed in the attack, he said. Odho said an explosion had been heard when the attack began; however, its cause had not been determined yet.“What is confirmed is that as soon as the attack took place, the Rangers personnel immediately took positions and engaged these attackers in a gun battle,” he said. The area was cordoned off and surrounding roads also closed. Sindh Home Minister Zia ul Hasan Lanjhar said Special Security Unit commandos and the Anti-Terrorist Force were helping Rangers personnel in the clean-up operation.