A man was detained under the Mental Health Act yesterday afternoon (April 3) after threatening to jump in the river at various points in Bexley.
The Gravesend RNLI team was called by the London Coastguard to reports of a person whom was intent on self-harm and about to enter the river at Jenningtree point, Erith.
They searched between Crossness and Erith but could find anyone.
On the way back to the station they were called to the same person who was then located in Thamesmead and threatening to jump in the water.
The RNLI failed to find him but the police found him in Woolwich through tracking a mobile signal.
A Bexley Police spokesman said: "Police were called at around 3.20pm to reports of a person threatening to jump in the water in Erith.
"A man in his 40’s was detained nearby under the Mental Health Act and taken to hospital."