Future New York kidnapper was with his dad when he snatched boy off the street

The two men involved in a terrifying Queens kidnapping attempt are father and son, law enforcement sources told The Post.

The spooky and bizarre kidnapping of a child took place Thursday night, when Dolores Diaz was walking along Hillside Avenue with her three children, including Jacob, 5, when a young man identified by cops as James McGonagle, 24, jumped out of a nearby car, grabbing Jacob on the sidewalk and throwing the boy into his vehicle.

The family don’t know McGonagle, they said.

The incident was caught on surveillance video, which showed heroine mother Diaz snatching her young son from the car through the open front passenger window – and an older man in an orange shirt who was with McGonagle .

Sources now say the older man is the father of 55-year-old McGonagle, also named James McGonagle. It is not known if the father knew his son would try to catch him.

After the frightening incident, young McGonagle, from Pomonok, apparently went to Brookdale Hospital – where he punched an innocent passer-by in the face, without provocation, the victim told the Post.

Police responded to the hospital after the alleged assault, and that was when a sharp-eyed officer recognized McGonagle from the Crimestoppers video of the incident, the source said, and alerted the detectives.

It’s unclear why McGonagle went to the hospital to begin with, but while he was there he apparently spontaneously blurted out: “I tried to kidnap a child today,” sources said. The statement was apparently captured on body camera footage of a police officer.

Investigators contacted James McGonagle’s mother Cassandra, 53, who identified the couple as the two men involved in the kidnapping attempt.

McGonagle was admitted to the hospital’s psychiatric ward early on Friday, law enforcement sources said.

Police said on Saturday they were looking for the elder McGonagle.

Young McGonagle has been charged with attempted kidnapping, reckless endangerment and acting in a manner detrimental to a child in connection with the incident, the NYPD said.

Records show Cassandra McGonagle has been involved in brawls with her husband and son in the past.