Besides the usual rush hour traffic, commuters in Austin, Texas, Monday also had to deal with reports of an imminent zombie attack.

Two city construction road signs near the University of Texas were hacked to display the warnings, reported the Austin American-Statesman.

The electronic signs, which usually warn motorists of traffic detours, instead included warnings such as "Caution! Zombies Ahead!" and "Nazi Zombies! Run!!!"

The signs also instructed motorists to "run for cold climates."

The hacking occurred within weeks of various articles appearing online with descriptions of how to hack into these road signs -- which point out that such an act is illegal.

According to a KXAS-TV story, Austin officials weren't too amused by the warning, noting the signs are used to report road conditions and accidents. They are working to find out who hacked the system.