It is suspected that 23 Chinese kindergarten students have been deliberately poisoned by their teacher.

The teacher, who can be identified by the surname Wang, has been arrested in eastern China after it is believed he adulterated the children’s food with sodium nitrate, according to the Jiaozuo city police.

The children were served rice porridge for breakfast at the kindergarten and after eating it they began vomiting and fainting, with one parent saying their child was taken to hospital where their stomach was pumped.

Whilst police have said they are still yet to find a motive for the incident, the BBC reported that Chinese media quoted police saying the suspect was seeking revenge on a colleague.