There was an incident where two assailants used guns to attack rival students at different engineering institutes in front of a bank in the Khlong Toei area. The victim fell down with a bullet and continued to shoot 3 more times, seriously injuring him. As for the unlucky female teacher, she came to withdraw money. She was hit in the head by a stray bullet and died.
Resource:
https://mgronline.com/crime/detail/9660000101461