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We conducted an SiO maser survey towards 221 O-rich AGB stars with the aim ofidentifying maser emission associated with the Sagittarius stellar stream. Inthis survey, maser emission was detected in 44 targets, of which 35 were newdetections. All of these masers are within 5 kpc of the Sun. We also compiled aGalactic SiO maser catalogue including ~2300 SiO masers from the literature.The distribution of these SiO masers give a scale height of 0.40 kpc, while 42sources deviate from the Galactic plane by more than 1.2 kpc, half of whichwere found in this survey. Regarding SiO masers in the disc, we found both therotational speeds and the velocity dispersions vary with the Galactic planedistance. Assuming Galactic rotational speed $\Theta$0 = 240 km/s , we derivedthe velocity lags are 15 km/s and 55 km/s for disc and off-plane SiO masersrespectively. Moreover, we identified three groups with significant peculiarmotions (with 70% confidence). The most significant group is in the thick discthat might trace stream/peculiar motion of the Perseus arm. The other twogroups are mainly made up of off-plane sources. The northern and southernoff-plane sources were found to be moving at ~33 km/s and 54 km/s away from theGalactic plane, respectively. Causes of these peculiar motions are stillunclear. For the two off-plane groups, we suspect they are thick disc starswhose kinematics affected by the Sgr stellar stream or very old Sgr streamdebris.

SiO Maser Survey towards off-plane O-rich AGBs around the orbital plane of the Sagittarius Stellar Stream