The death of a prisoner who was found with fatal neck wounds inside a privately-run jail is not being treated as suspicious, police have said.
The inmate, aged in his 40s, died at Thameside Prison at about 2.30am on Sunday.
A post-mortem examination found he had died from incised wounds to the neck.
The Met said: “Following this result and having taken all the available evidence into consideration, police are not treating this death as suspicious.”
The force added that the inmate’s family are “being supported by specialist officers”.
HMP Thameside is a Category B prison run by the private company Serco and holds more than 1,200 inmates.
A man, in his 30s, was initially arrested on suspicion of murder but has since been released under investigation.
Officers from the Specialist Crime Command have been informed and enquiries into the circumstances continue.