The blaze was reported at around 7:10 AM from the third floor of the National Buildings Construction Corporation (NBCC) building on Lodhi Road housing the DMRC office.
Twenty-two fire tenders were rushed to the spot and the blaze was doused by 9 AM.
The fire engulfed the entire floor housing the Delhi metro office but no one was injured.
The cause of the fire is yet to be ascertained but a short circuit is suspected to be the cause.