Authorities are investigating after another hidden security camera was found in the yard of a Los Angeles County home.

This latest instance in this alarming trend across Southern California happened last week in the city of San Marino.

According to the San Marino Police Department’s weekly activity report, a gardener found a camouflaged security camera while trimming hedges in the yard of a home on the 2500 block of Canterbury Road.

The device was collected by police and an investigation has been launched, but no additional details have been released at this time.

This is at least the fourth hidden camera discovery in March alone, coming just days after another hidden camera was recovered after a home was burglarized in the West Hills neighborhood of L.A. Prior to that, a hidden camera was found outside a home in Encino, and another was found outside a home in Chino Hills.

The exact reason for these hidden security cameras typically revolves around home invasion burglaries, with authorities theorizing that thieves monitor them to determine patterns and eventually decide on a time to commit a break-in.

Authorities urge homeowners to remain diligent and search their property for possible cameras, which are often camouflaged and hidden in vegetation, sometimes in trees and in hard to reach areas. They typically consist of a camera, a battery pack and a memory card.

Anyone who finds a camera hidden on their property should contact authorities and do not touch it until investigators on scene can examine it.

Last year, Glendale police arrested four Colombian nationals who are accused of running a “burglary tourism” operation that involved the use of camouflage cameras. Three other Colombian nationals were arrested in connection with a similar scheme in Temecula.