The building 'Rupal Apartment' crashed in Ranip area of the city at around 11 am, the official said, adding that rescue operations were on.
Two persons, who were rescued from the building, were rushed to hospital, they said, adding that civil defence personnel were also helping in rescue work.
Further details were awaited.
Image: A videograb of the site of the building collapse at Ranip, Ahmedabad
Courtesy: NDTV