Miami-Dade Police Detective Roy Rutland said homeowner Jean Viollis of Kendall called 911 around 3:30 p.m. Wednesday and reported discovering an object resembling a grenade in her back yard, WSVN-TV, Miami/Fort Lauderdale, reported Thursday.
"She contacted Miami-Dade Police, we subsequently contacted our bomb squad. They have since examined this item, and it does in fact appear to be a 40mm ordinance, grenade type, military-type weapon," Rutland said.
Police transported the grenade to an undisclosed location around 9 p.m. Wednesday.
"It appears this is a very deadly weapon. Had this weapon activated, it could actually take out a vehicle," Rutland said.
Investigators said they do not know where the grenade came from or how long it was in Viollis' yard.