Police have charged a soldier with murder over the shooting at an army training facility that left two people dead and another wounded on Wednesday, a police spokesman said on Friday.
Sgt-Maj Yongyut Mungkornkim, a clerk at the Royal Thai Army War College, will stand trial in a military court in the north of Bangkok on Wednesday.
He faces charges of premeditated murder, attempted murder, possessing a gun in a public place and firing a gun in a public place.
National deputy police spokesman Kissana Phathanacharoen said the military court would decide whether or not to grant bail.
Sgt-Maj Yongyuth's mental and physical health was being assessed by medical professionals at a hospital, Pol Col Kissana said. Police investigators have 84 days to conduct their investigation and report on the case before forwarding documents to the military court's attorney, he added.
In the past year, there have been at least two other fatal shooting incidents by serving soldiers. And in 2020, in one of the kingdom's deadliest incidents in recent years, a soldier gunned down 29 people in a 17-hour rampage and wounded scores more before he was shot dead by commandos in Nakhon Ratchasima.