Recently observations of a narrow baryonic state decaying to charged kaons and neutrons or K^0_s mesons and protons have been reported by several experiments. This resonance could be identified as a candidate for the exotic heta^+(1530) pentaquark state. The H1 results on the search for the heta^+(1530) and its antiparticle in the invariant mass combinations of K^0_s mesons with protons and antiprotons in deep inelastic scattering at HERA are reported.