Gunmen opened fire on Sunday in a synagogue, at least two churches, and at a police post in the southern republic of Dagestan, Russia reported, killing a priest and at least six police officers. The attacks appeared to be coordinated and took place in the cities of Derbent and Makhachkala, CNN reports. Two of the attackers were killed, Russian state-owned news agency RIA Novosti said. “Father Nikolay was killed in the church in Derbent, they slit his throat,” a regional official said. The priest was 66 and had served the Russian Orthodox congregation for 40 years. Other priests locked themselv…