Two men found dead on train tracks had been on top of a freight train wagon, police have said.
They were found after police were called to the line between Hackney Wick and Stratford in east London in the early hours of Thursday.
British Transport Police said a 27-year-old man from Clerkenwell and a 25-year-old man from Aberystwyth sustained serious electrical burns.
Their families are being supported by family liaison officers, it added.
Det Sgt David Taylor said officers had worked throughout the night to understand what had happened to the men.
He added: “The initial evidence that we’ve been able to gather suggests that both men were on top of a moving freight train wagon, when they came into contact with the overhead power lines.”
On Thursday, a police spokesman confirmed they were investigating whether the victims were graffiti artists or “train surfers” as “open lines of inquiry’,
But Det Seg Taylor said: “Our investigation will continue to examine how and why they came to be on top of this train although there is nothing to indicate that graffiti was involved.”