A carbon monoxide leak was the cause behind the evacuation and closing of an East Dunbartonshire school, it has been confirmed.

Council chiefs have tonight revealed Balmuildy Primary School in Bishopbriggs will re-open tomorrow after an investigation.

It has emerged that levels of the dangerous gas were found in three areas of the school.

This morning we told how one furious parent of two children at the school sent an open letter to the First Minister regarding her concerns.

She told how children were suffering symptoms of severe headaches, dizziness and fainting on Thursday - the day the school was closed.

READ MORE: Mum demands answers after Balmuildy Primary School evacuated amid gas alert

Emergency services raced to the school that day after the alarm was raised - and pupils were taken to the nearby Leisuredrome to be collected.

Now, after an investigation that lasted over the weekend, the school has been deemed safe to re-open.

East Dunbartonshire Council's education, people & business depute chief executive Ann Davie said: "I have written to all parent/carers this afternoon to let them know that, after a thorough investigation over several days, the school has been declared safe and will reopen tomorrow.

"Levels of carbon monoxide were found in three disparate areas of the school.

"A backup gas boiler was identified as the source so the gas supply to it has been shut off and it has been decommissioned.

“I fully understand that this has been a worrying situation for the school community but would like to reassure everyone that the health and safety and wellbeing of all those at the school has been at the forefront of our thoughts and actions.

“In addition to providing a comprehensive list of questions and answers for parents/carers, myself and other senior Council officers will attend a meeting at the school this evening to respond to further questions. I hope this will alleviate any remaining concerns and offer reassurance.

“Finally I would like to thank everyone for their patience and understanding during what has been a difficult situation."