Authorities on Thursday said they weren't sure if the people who threw a rock from a bridge at a car traveling on the Kansas Turnpike also are responsible for a rash of similar incidents two years ago.
The Kansas Turnpike Authority said the rock was dropped onto the windshield of a westbound pickup truck about 7:15 p.m. Wednesday from the Michigan Street bridge.
The rock cracked, but did not shatter, the vehicle's windshield. There were no injuries.
The driver of the pickup reported seeing three boys toss the rock.
Lawrence police searched the overpass but didn't find anyone.
Frank Goddard, an administrative assistant with the KTA, said a $2,000 reward still is being offered for information leading to the arrest of those responsible for at least 20 reports of people throwing rocks from turnpike overpasses and bridges onto moving vehicles between Lawrence and Topeka on May 7, 1994.
A month later, a woman received minor injuries after someone threw a rock at her moving vehicle on the turnpike.
The woman suffered cuts on her hands after her windshield was broken about 11 miles east of Lawrence
Anyone with information about those incidents or the latest incident should contact police at 841-7210 or the KTA at 843-5826.