Police said they believe “there are people who may have information about this attack” and encouraged them to call the sheriff’s office at 763-427-1212 or leave an anonymous tip on its website.

“If you find that you have agitated another driver, whether the fault is truly yours or not, do not react or retaliate to the other driver on the road. This will only cause the situation to escalate. Remind yourself that the other driver is just bad at handling stress, avoid eye contact and continue to practice safe driving habits,” Safe Motorist, which offers online courses on driving, says on how to handle road rag