<p>A suicide bomb ripped through the Karrada area of central Baghdad on April 28, killing four police officers and injuring five, according to Iraqi media citing an official</a>.</p><p>An attacker was driving a car when they were stopped at Murur checkpoint. There, the attacker detonated explosives, the same source said.</p><p>This footage was shared by an Iraqi community page the same day, and is described as showing the explosion at the checkpoint.</p><br />