Embraer Jet Undifferentiated or Other Model
Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor; Flight Deck / Cabin / Aircraft Event Passenger Misconduct
General Police / Security Involved
Human Factors
'LAV SMOKE' annunciator and warning.  Determined through Flight Attendant (FA) that a passenger was smoking an E-Cigarette in lavatory.  No actual smoke or danger.  Indication resolved.  Continued on without incident. Had security meet aircraft at gate.Actual non emergency cause only known by chance because FA happened [to] catch passenger still in lavatory and passenger was honest about his actions.Make prohibited E-cigarette use in lavatory more known to the passengers to prevent unnecessary diversion in the future.
An EMBRAER Regional jet First Officer reported receiving a LAV SMOKE message related to a passenger smoking an E-cigarette in the lavatory.