BOLDUAN: New in morning, a possible sniper who has been shooting at vehicles along a busy stretch of Interstate 10 has struck again, or maybe not. There's new fears of a copycat. Two additional shootings on other roadways could be the work of a copycat. Right now, they're treating this as a separate case.</s>BERMAN: There have been 11 shootings within two weeks on Interstate 10. Luckily, only one minor injury we know of. Police have no suspects, no clues. CNN's Sara Sidner is live from Phoenix right now. Sara, I covered a similar thing like this in Columbus, and one of the biggest fears among law enforcement was the idea of copycat shooting. This is the very thing they've been worried about there.</s>SARA SIDNER, CNN CORRESPONDENT: Right. That's exactly right. 11 shootings they have confirmed, and that included one from yesterday but there were two yesterday that happened off of I-10 on other highways, and a source with knowledge of the investigation told me, look, we are looking at those as potential copycats, and so there is a lot of concern by drivers, as you can imagine. They don't care if it's copycats or if this is the work of a serial shooter. That means there may be two or more people out there taking potshots at drivers as they fly down Interstate 10, one of the busiest highways in Arizona and across the country. One of the country's longest going from Florida to California. There is a lot of concern among folks here and law enforcement itself saying that they are very, very worried that this is going to eventually seriously hurt someone or potentially even kill someone. We know that they've been asking for the public's help. They have been imploring the public to call with tips, and they are getting hundreds of calls according to the head of DPS. I want to let you hear, there is one group out there that is armed to the teeth and they have reacted to that call, and they're coming out here and they are completely and utterly putting all their focus on trying to find who the shooter is.
Possible Copy Cat Sniper on I-10 in Arizona.