Iraq: Car bomb hits Baghdad, 3 US soldiers killed north of capital, mass graves found

A car bomb exploded Wednesday near the Baghdad home of an Iraqi police general, killing 13 people in the biggest such attack on the capital in months.

Meanwhile, three U.S. soldiers were shot dead in northern Iraq, and the decaying bodies of at least 23 Iraqis were discovered in a shallow grave and a sewer shaft at separate sites near the capital.

Wednesday's car bomb was the deadliest such attack in Baghdad since mid-March. A year ago, car bombs were part of the daily din of violence in Baghdad _ with hundreds sometimes killed in a single, devastating blast _ but they occur far less frequently now since a U.S. troop buildup.

The Iraqi general …