BAGHDAD - The US military announced the deaths of six more troops on Friday, including two killed by Sunni Arab insurgents in their stronghold of Al Anbar province, west of the capital.A marine and a soldier died from wounds received due to “enemy action” during combat operations in Al-Anbar Friday, while another marine died from a heart attack while operating in the province. Earlier, the military announced the deaths of three soldiers in two separate traffic accidents Thursday.