  We report the first observation of the Xi- pi+ decay mode of the Xi0(1690),
confirming the existence of this resonance. The Xi0(1690) were produced by
Sigma- of 345 Gev/c mean momentum in copper and carbon targets. The mass and
width are close to those observed earlier for the Xi-(1690) in the Lambda K-
decay channel. The product of inclusive production cross section and branching
ratio is given relative to that of the Xi0(1530).
