Two roadside bombs killed two soldiers in a restive northwestern region of Pakistan on Sunday while a gun attack in the country's south killed two more, officials said. Two officials said three soldiers sweeping the road ahead of a military convoy on the road between the towns of Miran Shah and Razmak in North Waziristan were hit Sunday by a bomb planted near an intersection. Two died and one was wounded. The same officials reported a second blast on the Mir Ali-Miran Shah road near a checkpoint, but that wounded only one soldier. Also on Sunday, four gunmen riding on motorcycles opened fire on a police patrol in the southern city of Karachi, killing two officers and wounding a third one, said Usman Bajwa, a senior police officer. Bajwa said the police patrol had deployed in a central neighborhood of Karachi, the country's main commercial hub, where two political workers were similarly gunned down by armed motorcycle riders yesterday. He said the gunmen fired 15 shots from their pistols into a police vehicle, killing two officers and leaving a third struggling for his life. The police officer said seven people were gunned down, including a police officer and two political workers, in different incidents in the city yesterday. He said the attacks appeared part of a "plot" to destabilize Karachi, according to a report of the Associated Press.