A man aged 54 suffering burns was taken to a south London hospital where his condition is understood to be critical after the fire in Streatham.
Police inquiries are underway after two bodies were found at the scene of the fire, on waste ground at Streatham High Road SW16, near the junction with Lewin Road.
Police were called to the scene at around 2.30am this morning.
London Fire Brigade extinguished the fire.
The Met say post-mortems will be scheduled in due course.
More top news
Police have released an e-fit of a man suspected of attacking her.
The force has been tweeting after carrying out a series of dawn raids.
Adenike Akingbogun made the dangerous manoeuvre after ignoring the crossing lights and driving onto the tracks.