As the probe into a total of 15 syringes found in the merchandise of Cartersville's Walmart continues, Bartow County Sheriff's Office investigators say later reports could be copycat crimes, Atlanta Journal-Constitution reports.

Investigator Russell Ballard told WSB-TV the latest needles found aren't the same type as the first round that pricked two people. While they aren't discounting the possibility some needles reportedly found in clothing could be copycats, investigators say they are taking all the reported syringe finds seriously to determine if each is legitimate.

Meanwhile, Walmart is bringing in extra security personnel and searching clothing as it continues to assist law enforcement in reviewing surveillance footage, according to WSB-TV.

The syringe scare has been ongoing since late November, but so far investigators have made no arrests and have few clues.

Authorities ask the public to help by dialing in tips.

Call the Bartow County Sheriff’s Office Criminal Investigations Division at 770-382-5050, extensions 6029 or 6030, with any information on any of the syringe incidents or on those responsible for hiding them or falsely reporting them.

Alternately, tipsters can anonymously provide the same information by calling the Cartersville-Bartow County Crime Stoppers tip line at 770-606-TIPS (8477). Rewards are available for information that leads to an arrest in the case.

Here's a recap of Cartersville Patch headlines related to the developing story:

• Walmart Syringe Total Reaches 15
• Investigator: Two More Walmart Syringes Found, Bringing Total to 11
• Syringe Evidence Yields No Clues
• Updated: Customers Find 8th, 9th Syringes in Walmart Clothing
• Three More Needles Found at Walmart
• Walmart Needle Victim Speaks Out
• 4 Needles Found in Walmart Clothing
• Shoppers Find Syringes at Walmart