The Metropolitan Police Bureau is investigating a complaint from a newly recruited policewoman that she was repeatedly abused physically and mentally during her first year of training.

A spokesman said that the police lance corporal was suffering from depression and receiving treatment and medication. The spokesman said an investigation would be done.

The spokesman was responding to a Facebook post by Pol L/Cpl Chontaros Sukdayotin, 25, on Sunday night that said she had been abused during her first year after joining the police force.

According to the post – which sounded suicidal – she wrote that a colleague accidentally kicked her head in a camp.

After her treatment and return to her camp – Naresuan in Phetchaburi province – she was repeatedly punished physically and mentally by her trainers.

She was verbally and physically assaulted, she wrote. Her lower legs were beaten with ropes and she was ordered to do headstands. She was also forced to take night shifts and was unable to sleep.

"I have done my best as a police officer. But no matter how much I try, I am still a patient. Thanks mostly to my police career, I have had depression. Today I have had enough. I wish such training would stop with my case. We should be trained to be tough, not to become sick," Pol L/Cpl Chontaros wrote.

She also wrote that she would hand all her assets to her mother and donate her body for medical study, before concluding her post with "farewell".