An investigation is under way after a secondary school in Limerick was damaged with graffiti promoting Covid-19 conspiracies.

The messaging was discovered when Castletroy College opened this morning after the weekend.

The graffiti was daubed at the front of the school building at the front and on the side walls.

Gardaí are investigating the incident and are appealing for any witnesses to contact them.

Some 1,200 pupils attend Castletroy College, making it one of the biggest secondary schools in Munster.