  A 22 GHz water maser survey was conducted towards 178 O-rich AGB stars with
the aim of identifying maser emission associated with the Sagittarius stellar
stream. In this survey, maser emissions were detected in 21 targets, of which
20 were new detections. We studied the Galactic distributions of H2O and SiO
maser-traced AGBs towards the Sgr orbital plane, and found an elongated
structure towards the (l, b)~(340, 40) direction. In order to verify its
association with the Sagittarius tidal stream, we further studied the 3D
motions of these sources, but found, kinematically, these maser-traced AGBs are
still Galactic disc sources rather than Stream debris. In addition, we found a
remarkable outward motion, ~50 km/s away from the Galactic center of these
maser-traced AGBs, but with no systermatic lag of rotational speed which were
reported in 2000 for solar neighborhood Miras.
