Bomb disposal teams were at the scene of a police operation in Derry.
The search operation was targeting "New IRA activity", police said.
It was carried out in the Letterkenny Road area of the city.
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Cordons were in place with several officers and at least six large vehicles at the scene.
Detective Inspector O'Flaherty said: “The planned search was conducted in the Letterkenny Road area.
“Nothing was located during the proactive policing operation.
“We understand the impact operational activity can have upon the day-to-day lives of local residents, please be assured we seek to maximise safety and minimise any disruption with any planned activity. Our primary focus is keeping our community safe.
"We are grateful for the continued support of local communities as we continue our work to disrupt those involved in terrorism-related activity. We encourage anyone with information, or concerns, to contact us on 101.”
Alternatively, information can be provided to Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org.
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