West Northam Primary and Avonvale Primary School in Northam were both vandalised on the weekend.
Thirty nine windows were smashed at West Northam Primary School.
Wheatbelt police senior sergeant Geoff Dickson said the damage was significant and resulted in kindergarten students being unable to use their classroom on Monday.
Senior sergeant Dickson said police are keen to find out who caused the damage. “Thirty nine windows is a significant cost,” he said.
This is following the incident at the primary school earlier this year where offenders broke into the kindergarten and threw glitter, items in cupboards and other contents over the floor.
Two door panels were also smashed on a building at Avonvale primary School over the weekend.
Northam police are currently investigating both incidents and would like assistance from the community in identifying people who went to the school over the weekend.
“The community needs to talk to us and tell us what is going on so we can make a difference,” said senior sergeant Dickson.
If you have any information, contact the Northam Police Station on 96224260 or Crimestoppers on 1800 333 000.