NSR string in AdS3 background:: Nonlocal charges

We consider NSR superstring in AdS(3) x S-3 x R-4 background. The action is expressed in terms of the variables on the group manifolds SL(2, R) and SU(2) as (1 + 1)-dimensional sigma-models with Wess-Zumino terms, associated with AdS(3) and S-3 respectively. R-4 is the flat Euclidean space. We show the existence of classical nonlocal conserved currents in the superspace formulation for the nonlinear sigma-model with WZ term in the context of NSR string. We propose Ward identities utilizing existence of the nonlocal conserved currents.