A police source told the Kuwaiti news agency KUNA the explosive-laden vehicle was driven by a suicide bomber into the company headquarters. The name of the company and nationality of the victims wasn't reported.
The New York Times reported nine people were killed Wednesday evening when a bomb exploded at an outdoor cafe in Baghdad. The Interior Ministry said 31 people were injured.
In a separate incident Wednesday, one police officer died and another was injured in fighting with unidentified gunmen in western Mosul, Iran's Press TV said.