Fire officials said seven fire tenders have been rushed to Block no. 4 inside the CGO complex in Lodhi road after a call was received by them at 12:17 AM.
"The fire is suspected to be emanating from the first floor of the building which houses central police organisations like BPRD, BSF, ITBP and CBI's CFSL. The building has been evacuated," a senior official said.
They said once the fire is completely doused, the exact estimate of the damage could be ascertained.