An 18-year-old man has been arrested on suspicion of murdering Leonne Weeks, 16, who was found dead on a path in Rotherham.
Fire Deaths In London Drop
The number of people who died in fires in London has halved over the past five years.
London Fire Brigade said 30 people were killed last year compared with 59 in 2010/11.
There were fewer than 20,000 fires in London last year, the lowest since records began in 1966.
The figures are the first to be released since the closure of 10 fire stations in London and the removal of 14 fire engines at the start of last year.
London Fire Commissioner Ron Dobson said: "Fire stations and fire engines do not stop fires happening, proactive fire prevention work by firefighters and a vigilant population does.
"The figures are a credit to firefighters, fire engineers, fire investigators, community safety specialists and many other staff who have made huge progress in educating people about the importance of fire safety.
"Every fire death is a tragedy and we will never become complacent as so many could have been avoided and we will continue to target those most at risk to further reduce the impacts of fire in the capital."
"Last year we visited 87,000 homes in London to undertake home fire safety visits. It's this grassroots work to target those most at risk from fire that has helped make London safer than ever."
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