Two hand grenades were found abandoned at an open field in Wilro Park, Roodepoort, last week Thursday.
As a result, residents are urged to remain vigilant.
They were found by a passer-by, who immediately alerted the police.
The police (SAPS) Explosives Unit was called to the scene and safely removed the grenades.
No arrests were made as yet, due to ongoing police investigations.
Picture: Suburban Control Centre.