Deputy inspector-general Hassan Salim and three other employees were driving to their office in the northern oil city of Kirkuk when assailants in a speeding car sprayed their minibus with bullets, according to Reuters.

Salim and another employee were killed instantly and the two other passengers were seriously wounded, police sources said.

Nobody claimed responsibility for the killings and police investigations have yet to uncover the perpetrator, according to a police officer in the investigating team.

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