A police helicopter and armed officers were tracking down two men who had suspected firearms on them in Greenhithe.
Police were called at 2pm and an armed response unit was close to Darent Valley Hospital.
Armed officers were reportedly searching through bushes on a road leading to Bluewater.
The two men were spotted with their suspected weapons near Watling Street.
A Kent Police spokesman said: “At this stage no offences have been disclosed and no arrests have been made.”
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