According to Delhi Fire Service officials, a call was received by them at around 12:55 PM, after which five fire tenders were rushed to the spot.
"Two people were killed and 11 were injured when an under-construction multi-storey building collapsed in Sadar Bazar's Gali Barna area," Deputy Commissioner of Police (North) Sindhu Pillai said.
While one dead body was pulled out of the rubble, another person died while being rushed to a hospital, he said.
As it was an under-construction building, most of the victims are labourers, they said.