Following a month-long investigation by the SFPD Narcotics Unit into alleged drug trafficking within the Tenderloin District, efforts culminated in the arrest of three suspects accused of operating a narcotics ring. Last night, SFPD officers detained Marvin Izaguirre Varela, 20, on the 900 block of Market Street in San Francisco after observing his departure from Oakland. A search of Varela revealed Fentanyl and paraphernalia indicative of drug dealing, according to the San Francisco Police Department’s official statement.