Authorities said 20 firearms have been stolen in separate incidents over the past two months from vehicles in Loudoun County.

The Loudoun County Sheriff’s Office said the thefts occurred from November to early this month in areas including Leesburg, Sterling, Ashburn, Round Hill and Hamilton.

Fourteen guns were stolen in 10 separate incidents in November and December, the Sheriff’s Office said. And last weekend, a county resident reported six guns were taken early this month from a vehicle in Ashburn.

Sheriff’s officials said that in many of the incidents, the vehicles were left unlocked or showed “no signs of forced entry.”

Officials have found “no indication” that the incidents are related, said Kraig Troxell, a sheriff’s spokesman.

Sheriff Michael L. Chapman warned that the thefts create a “great risk to the community.”

“Gun owners,” he said, “should properly secure and store their firearms in safe locations.”

Authorities reminded county residents to not leave their vehicles unlocked and not leave items in plain view. If a gun owner has to leave a weapon in a vehicle, it should be put in a lockbox and the ammunition should be removed from the vehicle and held by the owner.