Deaths among American forces and Iraqi civilians fell dramatically last month to their lowest levels in more than a year, according to figures compiled by the U.S. military, the Iraqi government and The Associated Press.

The decline signaled a U.S. success in bringing down violence in Baghdad and surrounding regions since Washington completed its infusion of 30,000 more troops on June 15.

A total of 64 American forces died in September — the lowest monthly toll since July 2006.

The decline in Iraqi civilian deaths was even more dramatic, falling from 1,975 in August to at least 988 last month, a decline of 50 percent, according to an AP tally. The civilian death toll has not been so low since June 2006, when 847 Iraqis died.