Ions, OH-(H2O)(n), were found to be ejected from a liquid beam of water under irradiation of Mid- and Near-IR lasers resonant to the fundamental and the fourth harmonic (nu(OH) = 4) of the OH-stretching mode of liquid water, respectively. Dependence of the ion intensity on a delay time between the two lasers reveals that locally preheated water by the Mid-IR laser helps ejecting OH-(H2O), to a vacuum through an ion pair (H+center dot center dot center dot OH-) created by the Near-IR laser.