New York State Trooper Thomas Mascia's claim that he was shot in the leg during a traffic stop on Long Island is under internal investigation

A New York state trooper's claim that he was shot in the leg during a traffic stop on Long Island last week is under internal investigation, authorities said Monday.

Cops have been searching for a shooter since Officer Thomas Mascia, 27, reported he was struck by a bullet during the stop on the Southern State Parkway in West Hempstead last Wednesday evening.

“State Police are investigating the circumstances surrounding the shooting involving Officer Mascia that was reported on October 30,” a police statement said.

“This is an ongoing investigation and further details will not be released at this time.”

It wasn't immediately clear what sparked the investigation, but police said they were no longer looking for the Dodge Charger that Mascia said was involved in the ordeal.

Authorities also executed a search warrant at the injured officer's home on Monday, according to police.

The development comes after investigators last week offered a $10,000 reward for information related to the shooting.

Mascia had reported that a suspect opened fire on him around 11:30 p.m. as he approached the vehicle parked on the median of the parkway

“Shots fired! Shots fired! I'm hit! “I think my kneecap is broken,” Mascia said on the police radio.

The officer said he thought the driver needed help and wrote down the license plate number before jumping out of his patrol car.

Another officer answered his call for help and rushed the injured Mascia to Nassau University Medical Center, where he underwent surgery.

A smiling Mascia was discharged from the hospital amid much fanfare on Friday.

Police and the soldiers' union immediately condemned the ordeal and said the perpetrator must be “brought to justice quickly.”

“We are outraged by the actions of this cowardly person who thought nothing of shooting a police officer who was simply doing his job,” the PBA union said in a statement.

“We thank the medical providers who are providing our brother with the care he needs and we will support him in what we hope is a speedy recovery.”

“This incident underscores the dangers our members bravely face every day in service of all New Yorkers and is a reminder that every interaction has the potential to be fatal.”

Authorities also executed a search warrant at the injured officer's home on Monday, according to police.

The development comes after investigators last week offered a $10,000 reward for information related to the shooting.

Mascia had reported that a suspect opened fire on him around 11:30 p.m. as he approached the vehicle parked on the median of the parkway

“Shots fired! Shots fired! I'm hit! “I think my kneecap is broken,” Mascia said on the police radio.

The officer said he thought the driver needed help and wrote down the license plate number before jumping out of his patrol car.

Another officer answered his call for help and rushed the injured Mascia to Nassau University Medical Center, where he underwent surgery.

A smiling Mascia was discharged from the hospital amid much fanfare on Friday.

Police and the soldiers' union immediately condemned the ordeal and said the perpetrator must be “brought to justice quickly.”

“We are outraged by the actions of this cowardly person who thought nothing of shooting a police officer who was simply doing his job,” the PBA union said in a statement.

“We thank the medical providers who are providing our brother with the care he needs and we will support him in what we hope is a speedy recovery.”

“This incident underscores the dangers our members bravely face every day in service of all New Yorkers and is a reminder that every interaction has the potential to be fatal.”