The aftermath of one suicide car-bombing that killed at least four people in Baghdad.<br/> This attack targeted a police station in the northwest of the Iraqi capital, leaving a large blast crater.<br/> (SOUNDBITE) (Arabic) LIEUTENANT SAJJAD, A WITNESS:<br/> "We were on our way to work when we heard an explosion. The blast was caused by a truck, a suicide bomber with a truck targeted the police building and policemen. The driver smashed through the checkpoint and the car exploded when it hit a concrete barrier. A fuel tanker also exploded causing a very big blast."<br/> The bombing was one of numerous attacks against the police and army on Wednesday, killing at least 23 people and wounding dozens of others.<br/> In the central Alwiya district, another bomber rammed an explosives-filled car into a police station, killing at least 13 people.<br/> And in the southern Ilaam district, a car bomb targeted a police patrol, killing at least three.<br/> Roadside bombs aimed at army and police patrols in the capital also claimed at least three more lives.<br/> The wave of apparently coordinated bombings underscores the ability of insurgents to hit multiple targets in Baghdad, despite security improvements and a fall in violence as U.S. troops prepare to withdraw by the end of this year.<br/> Nick Rowlands, Reuters.