Since 2004, tensions began to rise as the Georgian authorities strengthened their efforts to bring the region back under their rule. Georgia sent police to close down a black market, which was one of the region's chief sources of revenue, selling foodstuffs and fuel smuggled from Russia. This was followed by fighting by Georgian troops and peacekeepers against South Ossetian militiamen and freelance fighters from Russia. Hostage takings, shootouts and occasional bombings left dozens dead and wounded. A ceasefire deal was reached on 13 August though it was repeatedly violated.