Bombings in Baghdad and Karbala killed at least 56 people and wounded 78 more Saturday morning, police and medical officials said. A car bomb blast in a crowded shopping area of central Karbala, a holy city about 70 miles southwest of Baghdad, killed at least 43 people and wounded 55, according to an official at Hussein Hospital in Karbala. The explosion was near a bus station and just 200 yards from the Imam Hussein Holy shrine, CNN reported. Video of the scene broadcast on Iraqi television showed hundreds of people crowded around the bomb site as emergency workers placed victims in ambulances. A short time later, a car bomb exploded on the Jadriya bridge, which spans the Tigris River in southern Baghdad, killing at least 10 people and wounding 15 others, Iraqi police said. It was not immediately clear how badly the bridge was damaged. The Jadriya bridge attack came just two days after a suicide car bomb detonated on the Sarafiya bridge, which crosses the Tigris in northern Baghdad, also killing 10 people. Two large sections of the bridge collapsed into the river.