Despite police, fire brigade, ambulance and volunteers from the Severn Area Rescue Association attending the area and conducting a detailed search to locate the male he has yet to be found.
His family have been informed and efforts to find him are ongoing.
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World Heavyweight Champion Anthony Joshua is backing a campaign warning young people of the dangers of carrying knives.
It will be a cloudy start with rain clearing east during the morning.
Feeling cool with outbreaks of rain accompanied by strong winds.