The incident erupted when two experienced police officers arrived to carry out a request from social services to apprehend the boy’s 13-year-old brother.

Suddenly, the 12-year-old little brother, armed with a knife, attacked the officers.

“From our point of view, this was a routine assignment. It usually doesn’t lead to any trouble,” police spokesperson Mats Eriksson told the TT news agency.

But this time, police unexpectedly found themselves in the midst of a fight after placing the 13-year-old in the squad car.

Without warning, the 12-year-old attacked one of the officers with a knife, prompting several other bystanders to join the melee.

“The officer managed to disarm him, but was injured in the process. At the same time, the other officer ended up on the ground where he received a number of kicks and punches,” said Eriksson.

The officers were taken to hospital for treatment, but were released later in the day.

They returned to the police station where they were interviewed about what happened.

The 13-year-old boy was taken into custody according to plan, and taken to a juvenile care facility, according to Eriksson.

The 12-year-old younger brother who attacked police was interviewed by police before being handed over to social services.