  We have obtained high-resolution high signal-to-noise spectra of the SI
near-infrared doublet at 8694 A in eight metal-poor stars with metallicities in
the range -0.6 <[Fe/H]< -3.0. Elemental sulphur abundances were derived for six
targets and upper limits were set for two of the most metal-poor stars in the
sample. The sulphur doublet at 8694.62 A has been detected in three stars
(HD19445, HD2665 and HD2796) with [Fe/H]< -1.9. Our observations combined with
those available in the literature indicate a monotonic increase of the [S/Fe]
ratio as [Fe/H] decreases, reaching values [S/Fe]~0.7-0.8 below [Fe/H]=-2. We
discuss plausible scenarios for interpretation of these results.
