Drivers in Tandragee are being advised to avoid the Portadown Road.
It's after a two-car crash brought down a telecoms pole with a streetlight.
A police spokesperson said one driver was taken to hospital as a precaution.
She added it will take a while to clear and secure the area.
The Portadown Road is closed between Ballyknock Road and Brackagh Road.
It's expected to be closed for most of the afternoon.
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