DAMASCUS, Syria—A bomb attached to a bus carrying Syrian troops in Damascus exploded Tuesday morning, killing one soldier and wounding 11, state TV reported. The blast occurred during rush hour at a customs roundabout near the capital’s landmark Omayyad Square, according to the report. It gave no further details. There was no immediate claim of responsibility. Such attacks have occurred in Damascus in recent months amid an otherwise calm period in the capital. Government forces captured rebel-held eastern neighborhoods of the city in 2018. Government forces now control much of Syria with the help of President Bashar Assad’s allies Russia and Iran, while rebels are mostly cornered in the country’s northwestern province of Idlib. U.S. and Turkish troops, meanwhile, are deployed in parts of the country’s north and east. In October, two bombs attached to a bus carrying Syrian troops exploded in Damascus, killing 14. It was one of the …