A four-storey building collapsed near Oscar Public School in Burari area of north Delhi on Monday, a Delhi Fire Services official said.
Ten people have been rescued from the debris and admitted to a nearby hospital, he added.
"Our team rescued two girls aged 14 and six and took them to a hospital," Delhi Fire Services chief Atul Garg said.
The Delhi Police said in a statement that they received information around 7 pm about the four-storey building collapsing.
"A PCR call was received at 6:58 pm. A rescue operation is going on. Police, fire, DDMA (Delhi Disaster Management Authority) and NDRF (National Disaster Response Force) personnel are on the spot. So far, 10 people have been rescued and taken to the nearest hospital," it said.
Garg said nine fire tenders were deployed.
The police have cordoned off the area to prevent further accidents.