Ballwin police were summoned to the 200 block of Ramsey Lane about 9:30 a.m. on Sept. 5 when a worker digging a trench between two properties there unearthed a box containing three grenades.
Police officers responded and secured the area until the St. Louis Regional Bomb and Arson Unit arrived and took possession of the explosive devices.
According to Ballwin Detective Scott Stephens, the grenades appeared to be American made and could have been buried there for decades. Stephens said they may have been training grenades and perhaps had been secured so they wouldn’t explode.
However, two nearby businesses and an apartment building were evacuated and kept away from the scene for about two hours as a safety precaution.
At this point, police are not treating the incident as a criminal investigation, Stephens said.