Atleast 40 people were feared trapped under the debris, even as eye-witnesses claimed that rescue workers have pulled out six bodies.
However, no official confirmation on this has been received so far.
"Police have filed an FIR against the builder and municipal officials concerned who had sanctioned the building," the Chief Minister said.
More than 50 workers were on the site when the mishap occurred around 3 PM.
Parrikar, who was near Canacona to attend the state-sponsored folklore festival, rushed to the site.
"Current priority is to rescue people trapped under the rubble and the government has also taken help of Army to clear the debris," Parikkar said.
