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7:45 AM PT -- Law enforcement now tells us, Corey told police he believed he was being followed. At some point, Corey's bodyguard, who was a passenger in his car, shined a flashlight toward the other car. At the next light, one of the guys in the car that was following Corey got out and confronted the bodyguard. Another guy went to the driver's side and Corey says the guy stabbed him with some sort of syringe or other sharp object and then the car took off. Cops now say there is some sort of mark on Corey's abdomen.

Cops believe it was a road rage incident and the call went out as an assault with a deadly weapon.

6:45 AM PT -- Corey told the police the attacker appeared to be following him, and whatever the person allegedly stabbed him with was "long and sharp." We're told he feared it was a syringe, and went to the hospital to make sure he hadn't been injected with something.

6:20 AM PT -- Law enforcement sources tell us, although Feldman claims he was stabbed, there was no evidence of a laceration ... no cut to his abdomen. Cops tell us they don't know if Corey suffered any other injuries, but there was nothing visible on his body. He was admitted to the hospital in stable condition.

Corey Feldman has been hospitalized after he says a total stranger stabbed him in the abdomen and then escaped.

Corey says he was stopped at a traffic light Tuesday night in L.A.'s San Fernando Valley -- with a security guard -- when 3 men approached the car. He says while his security was distracted by the 3 guys, a car pulled up and another attacker jumped out, stabbed him and fled the scene.

Corey rushed to a hospital after the attack, and that's when LAPD was informed of the attack. Cops are now investigating, but Corey thinks he knows who's responsible.