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Emergency services have been scrambled to a river following concerns for a man's welfare.
Police, ambulance, fire and coastguard units descended on Rochester Esplanade following a 999 call at 5.20pm, when the individual was seen in the water.
Emergency services remain at the scene.
A spokesman for the force said: "Kent Police was called to Rochester at around 5.40pm to concern for a man in the water.
"Officers remain in the area near to The Esplanade alongside other emergency services and inquiries are ongoing."
A helicopter has been scouring the River Medway between Rochester Bridge and Sun Pier, Chatham, where more police and ambulance crews have been seen.
KentOnline reporter Nicola Jordan saw the activity at about 6.30pm.
She said: “There were emergency services on the Rochester side of the Esplanade, the coastguard was hovering about for around an hour; fire and ambulance and police were there.
"At about 7.20pm they said they were relocating to Sun Pier in Chatham.
"When I saw the heavy emergency response my first thoughts were, ‘oh no, I really hope the worst hasn’t happened.'"
More as we get it.