BAGHDAD - Ten more American soldiers have been killed in fighting in Iraq, the military announced on Sunday. Most of the 10 US soldiers were slain in and around Baghdad, the epicentre of IraqÂ’s vicious sectarian conflict and the focus of a controversial 28,000-strong surge in US troop numbers, which is due to peak next month.Four soldiers were killed in two attacks in the Sunni province of Salaheddin on Saturday, while another four were killed in blasts in the capital. A marine and another soldier died in combat north and west of the capital.