Three boys will face youth court for a trespass at Seaford Rise Primary School.

About 12.30am Friday 27 December, a police security officer responded to alarms at the Seaford Rise Primary School.

Three youths were seen to run from the school and a police patrol responded to assist.

A subsequent investigation led police to the home addresses of three youths where the youths made full admissions to being at the school.

A 16-year-old boy from Seaford Rise, a 16-year-old boy from Morphett Vale and a 15-year-old boy from Happy Valley were arrested and charged with serious criminal trespass. The investigation is continuing with further assessment of school buildings to be made.