The A1 southbound near Knaresborough was closed due to a police incident this morning.
North Yorkshire Police said the road was closed between junctions 47 and 48.
Officers urged drivers to avoid the area and seek an alternative route this morning.
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The route remained closed while emergency services deal with the incident.
A post on the Highways England website said:
“Delays are likely on the approach to the closure, with additional journey times also expected on diversion routes. Please allow extra time for your journey if travelling in the area or consider alternative routes.”
Update 10.10am – Highways England have confirmed the road is now open.
