Woman and 2 of Her Children Are Killed in Brooklyn Car Accident

“I heard the boom,” said Mr. Franco, 69. “It was really a big smash.”

On the street, Mr. Franco arrived at a gruesome scene. A woman’s lifeless legs protruded from underneath the Audi, which was upside down. Just feet away, two girls and a boy lay face up and bloodied in the street.

An emergency medical worker whom Mr. Franco recognized walked by and sprang into action, performing CPR on one child and then another until an ambulance arrived, Mr. Franco said.

Nearby, a man and his children emerged, shaken, from the Toyota, whose trunk had nearly been shorn off, Mr. Franco said. Members of the Fire Department arrived and pried open the door of the Audi. They then pulled out Ms. Yarimi and loaded her onto a stretcher.

Mr. Franco said minor accidents were common on Ocean Parkway, where drivers often drag race or spin doughnuts late at night, surpassing the 25-mile-per-hour speed limit. He estimated that Ms. Yarimi had been driving at least twice that speed.

Ike Yedid, 63, who also lives on Ocean Parkway, said that speeding was a continual problem. “This is the most dangerous area, nobody goes 25,” he said.

Hours after the crash on Saturday, the two vehicles remained at the scene.

The hazard lights on the overturned Audi flashed orange. The Toyota rested yards away, off kilter. All around, there was debris: crushed glass, smashed rearview mirrors and bloodied fabric.

Nate Schweber contributed reporting.