Authorities in Southern Nevada are issuing warnings about a surge in scams targeting residents, particularly involving impersonation of law enforcement. University Police Services alerted the community to a telephone fraud scheme where scammers pose as police officers, claiming victims are in legal trouble and demanding payment to avoid arrest. The Las Vegas Metropolitan Police Department's Cyber Investigative Group also reported an increase in email scams, where scammers falsely claim that spyware has been installed on victims' devices and demand extortion payments, often in Bitcoin. Additionally, the San Francisco Police Department has cautioned residents about scammers using their phone numbers to falsely claim outstanding warrants or criminal activity, emphasizing that they do not conduct cold calls. Residents are urged to remain vigilant and verify the identity of callers before sharing any personal information or making payments.