Two of the incidents happened close to each other on the 110 and 10 freeways.
DOWNTOWN LOS ANGELES (KABC) -- A driver was seriously injured when an object - believed to be a cinderblock - slammed through his windshield as he was driving on a downtown Los Angeles freeway.
According to the California Highway Patrol, there were at least three incidents overnight in which vehicles were hit by objects.
The incident that injured the driver - a man in his 70s - was reported around 11:40 p.m. Thursday.
According to authorities, he was driving near the westbound 10 Freeway and southbound 110 Freeway junction when the object cracked through the windshield and struck him.
His family told Eyewitness News he suffered multiple broken ribs, a broken collarbone, and a collapsed lung. He's currently being treated at a local hospital.
Another driver reported a similar incident on the northbound 110 Freeway near Adams Boulevard.
There was also a third incident, but few details on that case have been released. CHP said it happened in same area as the other two incidents. The driver in the case wasn't seriously injured, but the rock did smash the vehicle.
Meanwhile, there's no word on a suspect or suspects. Anyone with information is urged to contact authorities.