A lorry ploughed into an electricity substation on a major Sheffield road - leaving the driver trapped in his cab.
The lorry smashed into a substation next to J Horne Starlight on Penistone Road, Owlerton, with the lorry ending up wedged inside.
Police, firefighters and paramedics are at the scene.
One city-bound lane of Penistone Road is blocked off while emergency services are dealing with the incident.
A fire service spokesman said the driver was cut free from his cab by firefighters, who were alerted to the crash at noon.
A South Yorkshire Spokesman said the lorry was carrying rubble.
It collided with a number of bollards before crashing.