Police are asking anyone who may have noticed any suspicious activity in the Talbot Park area recently to contact them at Strand Road on the non-emergency number 101. Information can also be passed anonymously through the charity Crimestoppers on 0800 555 111.
A security alert at Talbot Park in Derry ended just before 7 o'clock last night after a suspicious object was reported by a member of the public.
A controlled explosion was carried out on the object which has been described as a crude but viable device.
It's now being examined by experts, and all roads in the area reopened last night.