The decision was made as an entirely precautionary measure as they had what could potentially be considered normal cold like symptoms.
The four staff members have been advised to contact their GP.
In a statement this afternoon, Abtran say that on an ongoing basis, they place a maximum priority on health, safety and wellbeing for all their staff.
Abtran say they have appropiate and ongoing awareness and preventative measures in place across all their operations during the current coronavirus outbreak.
They say that all staff are regularly updated in line with HSE guidelines and they are also operating an advisory phone line for any staff who need information or may have any concerns.
