This is the incredible moment a cop saves a two-month-old baby from choking by performing the Heimlich manoeuvre when its desperate parents brought it into the police station pleading for help.

The rescue was recorded by CCTV cameras in the police station's entryway in Cariacica, Espirito Santo, Brazil, on September 5.

Footage shows the baby's father arriving with the infant in his arms, urgently asking for assistance.

Police officer Bruno Martins, who was starting his workday, approached the door to see what was happening and noticed two men running up with the baby.

He said: 'The baby was already turning purple.'

With calm and agility, the officer intervened by gently performing the Heimlich manoeuvre, and the baby began to breathe normally again.

After the scare, the police officer stayed by the mother's side for a while. During their conversation, he offered the family advice on how to act if something like this happens again. The officer believes that if he had not been prepared, the baby might not have survived.

Martins said: 'I've been in the police force for almost 10 years, and I've had many intense experiences, but some of them will stay with me forever.

'I don't usually share much about them, but I had the honour and responsibility of saving the life of a newborn baby.

'When something like this happens, people see the uniform as a type of help. So, we have the chance to help and save lives.'

The Heimlich manoeuvre, also known as abdominal thrusts, is a first-aid technique used to help someone choking due to a foreign object obstructing their airway. It is designed to expel the object by creating pressure in the abdomen.