NEW DELHI — A portion of a bridge in the Indian city of Kolkata collapsed on Tuesday, sending vehicles nose-diving into the wreckage, killing at least one person and possibly trapping several others, government officials said.

Witnesses said the bridge collapsed during late afternoon traffic in the upscale neighborhood of Alipore, in southern Kolkata, a dense metropolitan area with over 14 million residents.

At least 19 people were rushed to a local hospital with injuries.