(NEWSER) – "You should be concerned," a spokesperson for the Arizona Department of Public Safety said during a press conference yesterday. "It has not ended in tragedy, but it could."

The AP reports four vehicles have been struck by bullets while traveling along an 8-mile stretch of Interstate 10 in Phoenix, with a 13-year-old girl being the sole injury so far. According to ABC 15, the shootings took place between Saturday morning and yesterday morning, and no suspects or motives have been identified. "We've had bullets hit the sides of the cars; we've had bullets hit windshields," says the DPS spokesperson.

Read the full story on