"We don't know why he did this. It appears he went mad."

After visiting victims in hospitals in the city, Thai prime minister Prayuth Chan-Ocha told reporters that the “a personal conflict over a house deal,” had sparked the shooting, according to Reuters press.

“He had an issue with money and fought for three days. Nobody expected it to turn violent,” he said.

He added: “I hope this is the only one and the last incident, and that it never happens again. No one wants this to happen. It could be because of this person’s mental health in this particular moment.”