There was no immediate claim of responsibility. Baghdad has seen a proliferation in recent years of well armed criminal gangs that carry out contract killings, kidnappings and extortion.
Some elements of powerful Shi'ite armed groups, which are seen as a critical deterrent against Islamic State militants, have also been accused of kidnapping people for political or criminal purposes. The security sources said another ministry official and two guards were also abducted. A ministry spokesman declined to comment but identified the deputy minister as Abdel Karim Faris. Last week, gunmen seized 18 Turkish construction workers from a sports stadium they were building in northeastern Baghdad. Iraqi security forces investigating the incident later raided the headquarters of a powerful Iranian-backed Shi'ite militia, but the workers are still missing.