Published: Oct 19, 2010 3:36 PM EDT
Updated: Oct 19, 2010 12:36 PM EDT

COLUMBIA CITY, Ind. (AP) - Authorities in northern Indiana say a Florida man died after being pinned beneath a riding lawnmower in a pond at his son's home.

Whitley County deputy coroner C. Taron Smith says 72-year-old Leroy Thomas of Avon Park, Fla., had been cutting grass when the riding mower apparently tipped over into the pond, trapping him underneath.

Smith tells The Journal Gazette that Thomas was underwater for about an hour Monday before his wife noticed he had not come in for lunch on time. Thomas was pronounced dead at the scene near Columbia City, and his death was ruled an accidental drowning.