Two FBI agents have been shot in an incident just miles from the Ferguson protests, but it is not thought to be related.

Rebecca Wu, a spokeswoman with the FBI St Louis division, said the agents were assisting the University City Police Department execute an arrest warrant at 2.53am local time today.

One agent was shot in the shoulder and the other in the leg. Ms Wu says neither injury is life-threatening.

She said the shooting, which took place about five miles south of Ferguson, was an unrelated incident.

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