Electromagnetically induced transparency has been observed in K-39(2) two-photon transitions by fluorescence detection. The two-photon absorptions correspond to 2(3)Pi(g) <-- X(1)Sigma(g)(+), transitions through A(1)Sigma(u)(+) similar to b(3)Pi(u) mixed intermediate enhancing levels, which are coincidentally on resonance with the excitation laser frequency. Laser intensity dependence of this effect has been studied and different detection schemes have been applied. (C) 2005 Elsevier B.V. All rights reserved.