Austin police are searching for a person who they say has been hurling large rocks at cars on the interstate.
Police said Wednesday that at least two people have been hit during four incidents on Interstate 35 between 2-5 a.m.
A June 14 attack left a man with critical injuries on his face and skull when a rock went through his windshield. Police say the man has brain damage and will potentially need care for the rest of his life.
Three other incidents were reported Sunday. Police say a woman suffered minor injuries.
Police are asking for the public's help to identify the person.
On July 15, an Arizona woman, 59-year-old Dyan J-Heim, and her husband, were traveling west on Interstate 20 in Weatherford when a golf ball-sized rock came crashing through the passenger side of the windshield and hit her.
Heim lost several teeth and a portion of her top lip. Police said the boys implicated in the crime told them they were trying to hit the trailers pulled by big rigs.
The Heim's vehicle was one of at least 12 that were struck by stones and railroad spikes, according to police.
In Massachusetts, a driver suffered a terrifying ordeal when an axe flew through her windshield and became lodged in the dashboard. Though the passenger was shaken up, she was not injured.
The axe fell off a truck; the driver was cited for failing to secure cargo.