The lifeless body of the victim was discovered with a gunshot wound to the chest on Soi Ranong 2 at 8.55 am. A pen gun measuring 25 centimetres in length was found at the scene.
Police said the victim was a passenger on a friend’s motorcycle when he was confronted by three or four assailants riding motorbikes without licence plates. One fired the fatal shot before they fled along Rama V Road.
The victim had been on the way to nearby Dusit Technical College, where he was a second-year student.
National police chief Torsak Sukvimol has instructed officers to apprehend the culprits as soon as possible.
Local police have also been ordered to implement measures to prevent more student shootings.
Monday’s murder came after a teacher was killed in the crossfire of a shooting involving vocational students in Klong Toei district on November 11. The student who was shot and critically injured in that incident died yesterday.
Rivalry between students at Bangkok vocational colleges has fuelled deadly shootings on the streets of the capital for years.