VISTA, Calif. (FOX 5/KUSI) -- Eleven people were arrested Tuesday during an operation aimed at narcotics dealer activity in the city of Vista, according to the San Diego County Sheriff's Office. Detectives from the Vista Sheriff's Station launched the investigation into street-level narcotics dealer activity within the city last May. During Tuesday's operation, seven people were arrested on felony charges and four others were arrested on misdemeanor charges, SDSO said. What to know about Trump’s calls to make Canada the '51st state’ The investigation consisted of undercover deputies pretending to purchase narcotics, specifically methamphetamine and fentanyl. This resulted in eight successful controlled purchases, according to SDSO. In addition, the operation led to arrest warrants being issued for seven street-level drug dealers, SDSO stated. In 2023 and 2024, Vista deputies responded to about 200 drug overdose incidents, leading to a total of 60 overdose criminal cases, according to the department. The effort was supported by the Vista Sheriff's Station's Community Policing and Problem-Solving Unit, the Sheriff's Gang Enforcement Team and the Narcotics and Gang Division.