An emergency diversion has been put in place after a sewer collapsed in Stocks Lane, Blofield.
The collapse happened this afternoon and vehicles are being sent on different routes.
First Group buses have said that their 15 and 15A services have been affected.
They will not be stopping at Cucumber Lane, The Street, Blowfield Road or Brundall Road. Instead the service will be picking passengers up from Yarmouth Road.
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