A second body has been found in a disused hostel badly damaged by a fire, police said.
Scotland Yard said they found the body after they were able to carry out a more thorough search of the building in Hackney, east London, which was initially too dangerous to enter because of the damage caused by the fire.
The blaze in Lower Clapton Road early on Saturday morning had already left one person dead and three people injured - one of them critically.
A Metropolitan Police spokesman said: "The building has now been secured and a further fuller examination and removal of the bodies will begin shortly."
The Met and London Fire Brigade are investigating the cause of the fire, which they are treating as unexplained.
Forty firefighters tackled the fire after being sent to the building just before 4am on Saturday.
The Metropolitan Police said four people escaped the flames.
A man who jumped 25 feet from a window before firefighters arrived is in a critical condition in the Royal London Hospital with burns and injuries from fall.
A man and a woman who were rescued from the roof of a porch by firefighters were treated in hospital for smoke inhalation and were later discharged.
Another man escaped uninjured. All of them are believed to be aged in their 20s, Scotland Yard said.