Emergency services were called to Lansdowne Place, Brighton, on Thursday evening following reports of several people feeling unwell in a flat.
Crews from East Sussex Fire and Rescue Service (ESFRS) and South East Coast Ambulance Service (SECamb) attended the scene after the alarm was raised just before 8pm.
All residents in the building were asked to leave. A small number of people reported feeling unwell and were assisted by crews and the ambulance service.
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The gas board was alerted and we handed over the incident.”
The condition of those affected has not been disclosed, but emergency teams remained on-site to ensure safety and assist residents.
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Authorities are reminding the public of the importance of having working carbon monoxide alarms in homes to prevent potential poisoning incidents. Investigations into the cause of the alarm are ongoing.
