A teacher who survived the massacre at a nursery in Thailand told how the killer pointed the gun at her head but she climbed over a wall to escape.

The female pre-school teacher Nanthicha Punchum said that Panya Khamrab, 34, then slashed at the throats and heads of children with a knife - and stabbed a six-months pregnant teacher to death.

Speaking in the video, she says: 'I saw the technician eating and was talking to him. I knew it was a gun because I heard multiple gunshots, and then I saw him put in the bullets and point the gun at me.

'I called the teacher, and the teacher was hugging the child. He kicked the mirror and I climbed the walls and asked for help.

'He was inside the child centre for a long time. He used a knife and cut all the kids' heads. He was carrying a small gun.

'I didn't know he was going to kill the kids. I thought he was going to come out but he stayed inside a long time. He used a knife and stabbed all the kids.

'He also stabbed a pregnant teacher. It was only a few months until she was due to give birth. He stabbed my staff.'