We conducted an SiO maser survey towards 221 O-rich AGB stars with the aim of identifying maser emission associated with the Sagittarius stellar stream .
In this survey , maser emission was detected in 44 targets , of which 35 were new detections .
All of these masers are within 5 kpc of the Sun .
We also compiled a Galactic SiO maser catalogue including \sim 2300 SiO masers from the literature .
The distribution of these SiO masers give a scale height of 0.40 kpc , while 42 sources deviate from the Galactic plane by more than 1.2 kpc , half of which were found in this survey .
Regarding SiO masers in the disc , we found both the rotational speeds and the velocity dispersions vary with the Galactic plane distance .
Assuming Galactic rotational speed \Theta _ { 0 } = 240 km s ^ { -1 } , we derived the velocity lags are 15 km s ^ { -1 } and 55 km s ^ { -1 } for disc and off-plane SiO masers respectively .
Moreover , we identified three groups with significant peculiar motions ( with 70 % confidence ) .
The most significant group is in the thick disc that might trace stream/peculiar motion of the Perseus arm .
The other two groups are mainly made up of off-plane sources .
The northern and southern off-plane sources were found to be moving at \sim 33 km s ^ { -1 } and 54 km s ^ { -1 } away from the Galactic plane , respectively .
Causes of these peculiar motions are still unclear .
For the two off-plane groups , we suspect they are thick disc stars whose kinematics affected by the Sgr stellar stream or very old Sgr stream debris .