A north primary issued advice to parents after a young pupil brought a knife to school to show their classmates.
Police and Highland Council confirmed last night the “small penknife” was immediately removed following the incident at Lybster in Caithness.
They said the knife had been taken to the 83-pupil school to show friends and ruled out any “malicious intent”.
The school’s head teacher Carol Grant wrote to parents urging them to be “mindful” of what their children had access to at home.
In the letter she said: “We wish to inform you that a pupil recently brought a small penknife into Lybster School.
“When this was brought to the attention of staff, the knife was immediately removed and the children were spoken to about the dangers of such an object.
“The parents of the children involved were informed of the incident and the police were contacted.
“Please be assured that incidents of this nature are very rare – but are treated very seriously when they do occur.
“We would ask that you as parents are mindful of what your children have access to at home and that they do not bring any inappropriate items into school.”
A Highland Council spokeswoman said: “We can confirm that a young child took a small penknife into Lybster Primary School to show friends.
“There was no malicious intent and no threat was made to children at the school.
“The school supported police on this matter and has reinforced safety messages with pupils and parents on pupils not bringing inappropriate items into school.”
A spokeswoman for the police added that officers had attended the school following the incident last month and offered guidance to pupils and staff.