Police's Godfrey Idwege says the public is ignorant about the law.
Ugandan police is concerned that these diplomatic number plates may find their way into Uganda.
In one incident, a former soldier was found murdered in his own house.
“The struggle continues and we shall continue to fight for the rule of law."
During the assault, a police officer was attacked by the group as he tried to arrest one of them.
The head was found wrapped in a green polythene bag. Examinations on it are due to be carried out.
Yiga is tasked with ensuring that the culture of professionalism takes root in the police force.
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