A former policeman killed 34 people, including 23 children, during a knife and gun rampage at a daycare centre in northeast Thailand on Thursday, police said, before later shooting dead his wife and child at home and turning his weapon on himself.

In one of the world’s worst child death tolls in a massacre by a single killer in recent history, most of the children who died at the daycare centre in Uthai Sawan, a town 500 km (310 miles) northeast of Bangkok, were stabbed to death, police said.

The age range of children at the daycare centre was from two to five years, a local official told Reuters.

Police identified the attacker as a former member of the force who was dismissed from his post last year over drug allegations and he was facing trial on a drugs charge.

The man had been in court earlier in the day and had then gone to the daycare centre to collect his child, police spokesperson Paisal Luesomboon told broadcaster ThaiPBS.

When he did not find his child there, he began the killing spree, Paisal said. “He started shooting, slashing, killing children at the Uthai Sawan daycare centre,” Paisal said.

“It’s a scene that nobody wants to see. From the first step when I went in, it felt harrowing,” Piyalak Kingkaew, an experienced emergency worker heading the first responder team, told Reuters.

“We’ve been through it before, but this incident is most harrowing because they are little kids.”

A large van that police said contained bodies of 22 people, mostly children, was seen by Reuters departing from a police station headed towards the city of Udon Thani, 80 km (50 miles) away, where autopsies would be performed.

‘I BEGGED HIM FOR MERCY’

A Reuters photographer also saw late on Thursday the body of the shooter, Panya Khamrapm, being moved in a bodybag from a van to a police station in the province.

Photographs taken at the daycare centre by the rescue team and shared with Reuters showed the tiny bodies of those killed laid out on blankets. Abandoned juice boxes were scattered across the floor.

“He was heading towards me and I begged him for mercy, I didn’t know what to do,” one distraught woman told ThaiPBS, fighting back tears.

“He didn’t say anything, he shot at the door while the kids were sleeping,” another woman said, becoming distraught.

Police said the attacker’s weapon was a 9 mm pistol and it had been obtained legally.

Thailand’s police chief said the perpetrator had tried to break into the premises and had mostly used a knife in the killings.