NEW DELHI — A building collapsed Thursday morning during a period of heavy rainfall in Mumbai, India’s commercial capital, killing at least 14 people and injuring 15, a local official said. Rescuers continued to search into the afternoon for an unknown number of people still trapped in the rubble.

The five-story building on Pakmodia Street, a busy section of the Bhindi Bazaar area in the south of the city, was about 100 years old.

It was part of a redevelopment project in the area that called for demolishing a dozen old structures, then providing housing in new ones for the residents, said Atul Shah, a spokesman for the governing Bharatiya Janata Party in the state of Maharashtra, which includes Mumbai.