A newborn baby who was delivered by emergency C-section after his parents were killed in a hit-and-run car accident on their way to the hospital has died, a New York police spokesman said on Monday.

The baby boy died from injuries overnight at New York's Bellevue Hospital, the spokesman said.

His parents, Raizy and Nachman Glauber, were 21-year-old Orthodox Jews from a close-knit enclave in Williamsburg, in the borough of Brooklyn. They were going to the hospital to have their first child.

A spokeswoman for Bellevue said she could not comment on the case.

Police were searching for the hit-and-run driver, a man, and a female passenger who fled the midnight accident that killed the boy's parents.

Police say their vehicle, a gray BMW sedan, struck the side of the taxi that was taking the couple to the hospital. The pair fled on foot, leaving the car behind.

Witnesses reported the BMW traveling at a high rate of speed, and the taxi was at a stop sign, police said.

A funeral for the baby's parents was held on Sunday in Brooklyn, where Orthodox Jews overflowed the synagogue and poured onto the surrounding streets. Pallbearers carried the pair of caskets, draped in black velvet.

The taxi driver was treated at a local hospital and released.