A POLICE helicopter and sniffer dog are leading the search as police investigate a stabbing in Darlington on Monday.
Officers arrested a 15-year-old boy on Monday evening after a teenage was stabbed on Collingsway, near West Park.
Video footage from the scene shows a roadblock in place on the A1 Southbound near Merrybent.
A roadblock on the Northbound side of the carriageway was later also enforced, but both carriageways have now reopened.
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