TOMBALL, TX (KTRK) --Investigators are trying to track down whoever has been attacking drivers as they use a portion of the Grand Parkway near Tomball.
Early Thursday morning, three drivers reported to the Harris County Sheriff's Office that rocks or other items were thrown at their vehicles. Each victim's windshield sustained damage.
"I was just like, what hit my car?" said Kristy Hutchins. She was driving home about 1:30 Thursday morning on the westbound Grand Parkway between FM 2920 and Boudreaux Road. She says she was traveling about 70 miles per hour.
Hutchins says something smashed into her windshield the very second the toll camera flashed.
PHOTOS: Windshield damage after random Tomball attacks
"I turned on my light and then I saw it and I heard the air coming through," Hutchins said.
It's not clear who is responsible or where the attacks were coming from.
Window repair shops say it's not uncommon to hear of an increase in this type of incident during the summer months when teens are out of school.
They can have far-reaching consequences, like in the case of Houstonian Megan Cox, who was critically hurt in 1998 when someone threw a brick at her vehicle. It shattered her windshield and severely damaged her face.
Hutchins wants whoever did this to her vehicle caught before someone else is hurt. "Why would you want to do that to someone to mess up their car? Try to harm them? It's wrong, just plain wrong," she said.
We've asked authorities if they have any video or pictures of those responsible. So far they have no information on any suspects.
The silver lining -- after Hutchins began posting about her ordeal on social media, Texan Glass and Solar Control heard about it and replaced her window for free.