Councillor Tierney was speaking after a number of windows were broken at St Therese’s Primary School late on Sunday evening.
He said: “There will be shock in the Galliagh community today as news spreads that the local school was attacked in this manner.
“A number of windows have been broken in the school which has caused disruption as numerous rooms cannot be used due to obvious safety reasons.
“I visited St Therese’s today and staff are genuinely shocked that anyone chose to attack the school.
“School budgets are challenging and all money should be spent on educating our children, not footing repair bills for needless vandalism.”
Mr Tierney concluded: “I would appeal to those involved in this type of behaviour to leave stop destroying our community.
“Anyone with information should bring it forward.”
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