Abstract: A locking assembly is provided for a pivotally openable window or door security grille (14, 82) of a building. To unlock the security grille (14, 82), a user operates an electric punch key pad (52) to cause a solenoid rod (168) to disengage a depression (182) and the operates a handle (54) to cause an actuator support bracket (100) to pivot in a forward direction from a first reference location to a second reference location against the influence of a coil spring (132), whereby a catch surface (130) no longer engages against a shaft member (26) which is free to leave a lockable location and allow the security grille (14, 82) to be pivoted to an opened position, and whereafter a slidable pin (152) engages a depression (150) under the influence of a coil spring (156).