State police in Beaver County are investigating two instances that happened 30 minutes apart in which rocks were thrown at moving vehicles on Interstate 376 in Brighton Township. The first incident happened shortly before 1 a.m. Monday when rocks were thrown from alongside the highway in Brighton Township at two Gordon Food Service Trucks. No one was hurt in that incident, which happened in the eastbound lanes near mile marker 35.5 Thirty minutes later police reported a rock was thrown at a moving vehicle near Chapel Road. In that situation the rock hit the hood and went through the windshield of the vehicle which had two people inside. No injuries were reported. No arrests have been announced.