New Delhi: A portion of an old building collapsed in Daryaganj’s Kucha Chelan Gali Sunday evening, bringing down an electricity pole and wires and blocking the narrow lane. No injuries or casualties were reported.Police said the building is old and dilapidated and is currently unoccupied, except for two shops operating on the ground floor.According to police, a portion of the staircase from the top floor collapsed onto the staircase of the first floor.