Owners of a family-operated Christmas tree farm are heartbroken after their earnings were stolen over the weekend.

"It was horrible," said Keith Yocum, of Yocum Brothers Nursery in Cumru Twp., Berks Co., near Mohnton.

Yocum told 69 News it was in the early evening Saturday when he realized close to $1,400 had been taken from a cash box that was momentarily left unattended.

"We had to cut some trees, and somebody took the opportunity to steal all of the money from the day's take," Yocum said.

The income earned from the farm is needed to keep the farm running, and the stolen earnings could have covered half of overhead expenses, said Yocum, adding that Saturday was "exceptionally" busy. Now, he fears there aren't enough trees to earn back the loss.

"It kind of hurt me a little bit more now that we don't have anything left hardly. We're not going to get it back. I wish we had a lot more trees," Yocum said.

Yocum said his family is using Facebook to help spread the word. He said they also contacted police and that an investigation is ongoing.

Police did not return calls made by 69 News on Tuesday.

Anyone with information about the theft can call Crime Alert Berks County at 877-373-9913. A cash reward of up to $5,000 is being offered for information that leads to an arrest.