  We reconsider the problem of determining the semiclassical 3-point function
in the Euclidean AdS_3 model. Exploiting the affine symmetry of the model we
use solutions of the classical Knizhnik-Zamolodchikov (KZ) equation to compute
the saddle point of the action in the presence of three vertex operators. This
alternative derivation reproduces the "heavy charge" classical limit of the
quantum 3-point correlator. It is different from the recently proposed
expression obtained by generalised Pohlmeyer reduction in AdS_2
