The NYPD has launched an internal probe into a Queens man’s claims that cops in an unmarked car plowed into him while he rode a motorized scooter — and “beat him,” sources told The Post on Tuesday.

The sister-in-law of 24-year-old Hector Candelier — who goes by the nickname Luigi — posted about the alleged Saturday incident on Instagram along with photos showing a bloodied and battered Candelier in a hospital bed.

“Help get justice for Luigi,” the post read. “If you know Luigi you know he not [an] aggressive person and always show love…[T]wo under-covers from the #75thprecinct hit him off his bike with their car and beat him.”

Police say that on Saturday at around 3:50 a.m. at the corner of Barbey Street and Jamaica Avenue officers saw Candelier riding the scooter without a helmet and attempted to stop him.

Candelier “then fled the location in a reckless manner and committed numerous vehicle traffic infractions,” police said, adding that Candelier “was operating the scooter on a sidewalk and lost control causing him to fall off.”

The cops then arrested Candelier who they found to be in possession of marijuana, police said.

Candelier was then hit with a slew of traffic violations and charges including reckless endangerment, reckless driving and unlawful possession of marijuana.

Candelier’s brother, Bryan Candelier, 28, told The Post Tuesday that his sibling claims the cops in the unmarked car “started chasing him.”

“They hit him one time with the car and he didn’t fall. He kept trying to get away and they hit him again. From there, he said he got beaten up and ended up in the hospital,” Bryan said.

“He said he actually got beaten up by the cops,” said Bryan. “They cracked his head open. He has stitches from his forehead to the back of his neck. He has scratches all over his body.”

Bryan said Hector, a pizza deliveryman, is recovering from his injuries at his father’s home.

“He’s stable, but he’s in pain,” Bryan said of his brother.

NYPD spokeswoman Detective Denise Moroney told The Post: “The incident is under internal review and the preliminary investigation appears the officer’s vehicle does not make contact with the complaints’ motorized scooter.”