Killings since the weekend pushed 2009 death toll past 1,607 killed in 2008 . The U.N. says more than half of those deaths were caused by anti-balaka rebels fighting for a separate state called South Sudan. In response , President Felipe Calderon sent federal troops to patrol the city . More than 5,100 killed in 2009 drug-cartel violence in Mexico , says newspaper .
Killings since the weekend pushed 2009 death toll past 1,607 killed in 2008 . Killings increased as Juarez and Sinaloa drug cartels began turf war in 2008 . In response , President Felipe Calderon sent federal troops to patrol the city . More than 5,100 killed in 2009 drug-cartel violence in Mexico , says newspaper .