Task: Translation
Input (Japanese): タイ軍は狙撃の直後、反対運動を鎮圧して4月上旬以降バリケードが張られていた地域の安全を確保すべく、抗議者たちを抑えようと素早く入り込んだ。
Output (English): Thai military forces moved in quickly to suppress the protesters just after the shooting, aiming to put down the opposition movement and secure the area in which they had barricaded themselves since early April.