One Iraqi was killed and nine others were injured after a bomb-laden car went off in northern Baghdad on Thursday, a security source said.The booby-trapped car was driven by a suicide bomber, the source added. Security forces cordoned off the scene of the incident, starting its investigation to identify the culprits.There has been a surge in sectarian violence in Iraq in the past year.Iraqi government data says more than 1,000 people died in January, the highest monthly toll for almost six years.