Nobody was present in the building as it was closed, today being a Sunday. However, three shops located on the ground floor of the one-storey building suffered damage, the official said.
"There was no fatality as the shops were closed, he said.
The Nacional Club, established almost a century back, is located on a busy street.
"The incident happened at around 3.30 PM when the slab fell," club president Tony Dias, who was on the spot when authorities were clearing the debris, said.