The man who called 911 to report a road-rage shooting in which George Zimmerman was injured said a motorist told him he “had to shoot at” the former neighborhood watch volunteer.

“A guy right here said he just had to shoot at someone through his window, so he wants the police to come,” the caller told a 911 dispatcher.

Kenneth Cornell, who was heard in a tape released Tuesday, added that the motorist, Matthew Apperson, “said it was George Zimmerman.”

Apperson, 36, was involved in the shooting with Zimmerman, 31 – infamous for killing unarmed black teen Trayvon Martin in 2012 – in the Orlando suburb of Lake Mary on Monday.

Zimmerman allegedly waved a gun at Apperson, who then fired at Zimmerman’s head. The bullet missed, but shattered a window, scattering glass that injured Zimmerman.

Cornell, who did not see the incident or Zimmerman, described Apperson as a “shaken guy in his car,” ABC News reported.

Cornell said Apperson told him he shot Zimmerman when he saw a gun.

No charges have been filed, but detectives are investigating the shooting as a possible aggravated assault with a deadly weapon without intent to kill, according to documents released Tuesday.

Mark NeJame, Apperson’s attorney, said his client acted in self-defense.

He said he knew of no ongoing feud between the two men – though police said Zimmerman and Apperson were also involved in a road rage incident in September.

Police spokeswoman Bianca Gillett said the 911 tape is only the first half of the call. The rest has “pertinent information” for the investigation.

Detectives have found a licensed .40-caliber Glock 22 handgun and a licensed .357-caliber revolver with one expended shell casing in Apperson’s vehicle, the Orlando Sentinel reported.

Zimmerman’s car was not searched yet, but detectives recovered a Glock handgun from him, the paper reported. He did not shoot during the incident, cops said.

Don West, Zimmerman’s attorney, said his client did not wave or shoot his weapon during Monday’s incident.

Zimmerman has said he is armed because of death threats.

“He did have a gun in the vehicle,” West said Tuesday. “He has a concealed-weapons permit and he often has a gun with him, especially when he’s traveling.”

The bullet went through Zimmerman’s passenger-side window, passed his head and lodged into the door frame, West said.

Zimmerman was hit by flying glass.

“His injuries were to his right forearm and face,” West said. “I’ve had several conversations with him by phone. He certainly was in shock when I first talked to him. It was a near-death experience, frankly, and he was pretty stunned by the whole thing.”

West said Apperson was following Zimmerman, who was on the way to a doctor’s appointment, before the incident, the Orlando Sentinel reported.

In September, Apperson called cops to report that Zimmerman had threatened to shoot him while they drove on Lake Mary Boulevard – but he did not press charges.

Monday’s shooting is the latest in a string of headline grabbers for the former neighborhood watch volunteer, who caused protests across America when he was acquitted in 2013 of killing Martin.

With Post Wires