A serial killer has been found guilty of murdering four young men by poisoning them with lethal doses of a date rape drug.
Stephen Port, 41, lured his victims to his London flat and secretly gave them GHB, the Old Bailey heard.
Scotland Yard believes there could be more victims and is reviewing 58 deaths in London spanning four years involving the drug.
Port, who denied 29 charges, will be sentenced on Friday.
The chef was also found guilty of 10 offences of administering a substance with intent, four rapes and four sexual assaults.
Between August 2014 and September 2015, Port murdered Gabriel Kovari, 22, from Lewisham, Daniel Whitworth, 21, from Gravesend, Kent, and Jack Taylor, 25, from Dagenham, east London.
The jury also found him guilty of murdering Anthony Walgate, 23, from Dagenham, in June 2014 by a majority verdict.
Port met his victims on dating websites, including Grindr, and coaxed them to his home in …