New York ? A car plowed into pedestrians on a New York City sidewalk for the fourth time in two days, hurting four people and raising the toll to nearly two dozen victims from the strange spate of wrecks.

Saturday’s accident in Brooklyn’s Flatbush neighborhood, which injured two toddlers, came a day after cars veered onto sidewalks at three locations in Manhattan, hitting a total of 18 people. Three were hospitalized in serious condition; 11 others were treated for less serious injuries.

Witnesses to Saturday’s accident said the car crashed into two children at play on the sidewalk, where they lay bleeding after being hit.

A 2-year-old boy was hospitalized in critical condition, and a girl of the same age was in stable condition, police said. Two young women, 16 and 19, were in stable condition.

Authorities did not say whether the women and children were related.

Police said that the 16-year-old driver ran from the scene, but that officers caught up with him and arrested him on charges including reckless endangerment, reckless driving and leaving the scene of an accident.