India, Aug. 16 -- Authorities issued an emergency alert Friday afternoon in North Windham, Maine, after a shooting, warning residents to shelter indoors and lock their doors as a suspected gunman remained at large. Law enforcement has launched an intensive search. It is currently unclear whether the alert was sent statewide or limited to Cumberland County.

The emergency alert stated: "FROM WINDHAM POLICE Gunman at large in North Windham. Shelter indoors, lock doors. Report suspicious behavior to 911. Last seen Windham/Raymond line. Stay inside. Tune to local news or Windham PD for updates."

Several residents confirmed receiving the alert.

One person wrote on Facebook, "On my wife's phone -- an extreme emergency alert from Windham Polic...