Police says officers are currently responding to a report of ‘a device’ in the Oeghill Hill Park area of Drumahoe, Derry.
No roads are currently closed because of the security alert.
Derry City & Strabane Superintendent Clive Beatty said: “We received this report shortly after 10 pm last night, Sunday 5th March.
“Extensive searches have been conducted, however, nothing untoward has been located at this time.
“As we continue with our enquiries this morning, we’re urging the public to be vigilant.
“We’re appealing to anyone who sees anything suspicious in this area not to touch it or pick it up, but to call us immediately on 999.
“We’d also ask anyone with information, or who may have been in Oeghill Hill Park last night and saw anything suspicious to call us on 101, quoting reference number 1741 of 05/03/23.”
You can also submit a report online using the non-emergency reporting form via http://www.psni.police.uk/makeareport/
Or call Crimestoppers anonymously on 0800 555 111 or online at http://crimestoppers-uk.org/