TEHRAN – Four Iranian border guards were killed on Wednesday in a clash with armed rebels near the Pakistani border, Iranian media reported. The fighting occurred in the Rask region in the southwestern Sistan-Balochistan province, Iranian media said without giving further details. Last month, state television reported the death of a police officer and five “terrorists”, said to be members of the Jaish al-Adl jihadist group, in the nearby Khash region. Jaish al-Adl is thought…