Transcript for Possible Serial Sniper in Michigan
And a possible sniper on the loose, taking aim at drivers. And authorities want to know, is the same gunman behind them all? Alex Perez with the story. Reporter: Tonight, Michigan authorities warning drivers near two major highways to be on high alert -- a possible sniper targeting motorists. We want to put an end to it before somebody gets hurt. Reporter: The nightmare unfolding on I-94 and I-69 in rural areas near battle creek, Michigan. Investigators say since late July, as many as six vehicles driving along the highways have been damaged. Sniper cases can be difficult to solve. I'm on the highway right now, and somebody just hit me, and I'm bleeding from my neck and I'm scared. Reporter: This spring, 20-year-old Cori Romero was shot driving north of Denver. The bullet went in one side of her neck and out the other. A trio of nearby shootings there, still under investigation. Back in Michigan, investigators working round the clock, even flying up above, looking for any clues that might lead to the shooter. It's like a big jigsaw puzzle, trying to put all the pieces together. Reporter: And investigators say if you believe your car was hit while moving, do not stop. Instead, take note of the area, get somewhere safe, and then
This transcript has been automatically generated and may not be 100% accurate.