Investigations are ongoing to find out why a school contaminated by norovirus wasn't cleaned properly.
Cleaners were supposed to tackle Ballacottier Primary School over the weekend after more than 100 pupils got sick:
Pauline Garcia is from the Department of Education and Children - it's been forced to re-open Fairfield Junior School as an alternative learning hub.
The Department of Infrastructure - which contracts the cleaners - has apologised and says staff are now working through a "complete decontamination" of the Farmhill site using "specialist materials".
It says it's also reviewing its processes to prevent an issue like this reoccurring in the future.
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