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Officers have made an arrest in connection with a stabbing incident which happened on the southbound slip road of the M5 at junction 21 (Weston-super-Mare) on Friday night.
A 42-year-old man from Birmingham has been arrested on suspicion of wounding with intent and is now in custody for questioning.
A 26-year-old man remains in hospital undergoing treatment for injuries which are not life-threatening.
Enquiries into this incident are ongoing.