A roadside bomb killed two US soldiers in a predominantly Shiite area in Baghdad on Monday, the first deadly attack against American troops in the capital in nearly a month. At least nine Iraqis also were killed in explosions elsewhere in the Baghdad area, Iraqi officials said, in a grim reminder of the dangers that continue to face security forces and civilians despite stark security gains over the past year. The US military said another American soldier was wounded when the blast struck a US patrol at about 9:30 a.m. in eastern Baghdad. The soldiers were the first to be slain in Baghdad since July 8, when a roadside bomb killed Spc. William McMillan III, 22, an army medic from Lexington, Kentucky, and wounded five other soldiers in the western neighborhood of Amariyah.