In at least three cities in the last 18 months, drivers have been targeted by “serial shooters,” the term police use to describe a sustained attack by elusive assailants who randomly fire onto busy highways.

In Kansas City, Mo., police hunted down a green Dodge Neon with Illinois plates. In Colorado, authorities are still on the lookout for a 1970s single-cab orange pickup truck connected to the shooting deaths of two people on a highway.

Now in Phoenix, another shooter or shooters are following the same general script. Twelve vehicles, from sedans and box trucks to commercial buses, have been hit by BB shots, unknown projectiles and, once, bullets.

Phoenix drivers were rattled again Thursday with reports of two shootings on a busy stretch of Interstate 10, the 11th and 12th such attacks since Aug. 29.
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