The United States will withdraw another 4,000 troops in Iraq by the end of October, the U.S. military commander in Iraq said in a prepared testimony for a congressional hearing Wednesday. U.S. Gen. Ray Odierno is expected to tell the House of Representatives Armed Services Committee that there has been a significant drop in violence in Iraq recently, according to the statement obtained by CNN. President Obama has said the U.S. combat mission in Iraq will end by August 31, 2010. Obama also said he plans to keep a range of 35,000 to 50,000 support troops on the ground in Iraq after combat troops are out. "We have approximately 124,000 troops and 11 Combat Teams operating in Iraq today. By the end of October, I believe we will be down to 120,000 troops in Iraq," Odierno said in the remarks. Odierno said statistics show violence has dropped in Iraq.