Windmill Balk Lane in Woodlands has been closed, transport bosses have said.
First South Yorkshire has announced that services 50 and 51 are being diverted outbound until further notices due to the closure.
Services will serve Woodlands shops and then continue up Great North Road, Tenter Balk Lane, Village Street, and resuming normal route at Doncaster Lane.
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We have asked for further information on the incident.