A bomb squad was dispatched to Dartford earlier and a cordon set up following a "neighbour dispute".
Kent Police said an explosive ordnance disposal team was sent to an address in Dartford Road after a search found "materials" that the Ministry of Defence went on to eventually deem safe.
Police were called at 11.40am to the original dispute between neighbours, and a man has since been arrested on suspicion of threatening behaviour.
A spokesman said: "While inside the address a number of materials were located and Kent Police is working with the Ministry of Defence to identify their purpose and safety.
"As a result, an EoD team has been dispatched to the scene.
"A cordon is in place and the address has been evacuated as a precaution."
An employee who works nearby to where the cordon is in place, which is near the junction for Wellington Road, said there was a heavy police presence.
He said: "There must have been three or four police cars, and a van, fire service - they are all here.
"There is a bomb squad here as well. The police have been here since maybe about 2 o'clock - it's all a little scary."
The cordon has since been lifted. One man remains in custody following allegations of threatening behaviour.
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