Five labourers were injured on Sunday after the boundary wall of a vacant plot collapsed in Rohini's Alipur, police said.
The Delhi Fire Service (DFS) received a call about the incident at 11.39 am and immediately three vehicles were rushed to the spot, a senior DFS officer said.
The wall collapsed when the labourers were working on the premises after which they suffered injuries and were rushed to a nearby hospital, a police officer said.
The injured are in stable condition and have been discharged from the hospital, the officer added.
A case has been registered against the contractor and the matter is being probed, police said.