The mortar found in the field near the Old Tram Bridge on Saturday 25 April
Another mortar has been found in a field near Avenham Park in Preston.
Preston Police were on the scene from around 6.30pm on Saturday after reports of another military mortar had been found.
The public had been asked to avoid the area.
A controlled explosion was not needed as it turned out to be a “harmless grenade” according to police.
Mortar is detonated in fields near Avenham Park
A mortar was found in the same field near the Old Tram Bridge on Saturday 25 April.
The bomb squad were called and a controlled explosion took place.