Emergency service crews were called to the scene of a suspected gas leak at an ambulance depot near Norwich.
An eyewitness spotted police, fire and ambulance crews at the station off Alex Moorhouse Way, next to the Longwater Retail Park.
A spokesperson for the fire service confirmed personnel from Earlham and Carrow were called to the scene shortly after 7am after a member of the public reported a gas leak.
"Crews are still investigating," the spokesperson said at 7.40am.
But the stop message was received shortly after, once it was confirmed that it was a false alarm.
In the same area in April, an emergency cordon had to be put in place and a busy road closed amid safety fears over another gas leak.
A 100m cordon was put in place at the time, while Alex Moorhouse Way was closed to all traffic for around two hours.
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