A provincial police official was killed in a roadside bombing on Friday in southeastern Iran, the semi-official Fars news agency reported. The police official had been travelling near Zahedan, capital of the impoverished Sistan-Baluchistan province, which borders Pakistan and Afghanistan and is a drug trafficking route. The incident follows clashes between security forces and armed groups including militants and separatists. Gunmen attacked a vehicle carrying Iranian army personnel in Sistan-Baluchistan, killing one person and injuring three others on Thursday, state media reported. "A minibus transporting personnel from a division stationed along the Makran coast... came under armed attack this morning," the official IRNA news agency said. The agency gave the dead man's name, but did not specify whether he was army personnel. In a separate incident in the same province, "a police patrol while carrying out its mission... came under a terrorist attack by armed outlaws," provincial police said in a statement on Thursday carried by IRNA. "Several terrorists were wounded and fled the scene... while a police officer was martyred," it added. Last week, Iran's Revolutionary Guards killed six members of a "terrorist" group in Zahedan, IRNA reported. The IRNA report said security forces had discovered and confiscated explosive packages. It did not identify the six people killed and gave no further information on the incident.