Sanjana, the three-year-old who had survived a building crash in Eijipura on Monday, died of burns on Thursday.
A 45-year-old building collapsed early on Monday, following an LPG explosion.
Sanjana didn't respond to treatment, according to Dr Ramesh K T, plastic surgeon.
"She had suffered 60% burns and fluid loss. Her chances of survival were limited," he said.
Two others rescued from the debris, Janaki (45) with 25% burns and Dilip (17) with 15% burns, are recovering.
Home Minister Ramalinga Reddy visited Victoria Hospital on Thursday morning to meet the survivors.
He said the government would pay the medical bills for Janaki and Dilip. "We will also provide compensation for the families of the victims," he told reporters.
Mayor Sampath Raj visited the hospital to pay his respects to Sanjana.
Blast and crash
The building in Ejipura, near Koramangala, collapsed after an LPG cylinder exploded on Monday.
Seven people died, including a pregnant woman. Sanjana was among the seven others who had survived with injuries.
Published 19 October 2017, 13:02 IST