A "Godzilla Attack" traffic sign on Van Ness.

Someone hacked into an electronic traffic sign on Van Ness Avenue in San Francisco Wednesday, posting alerts that said "Godzilla Attack" and "Turn Back."

Ali Wunderman spotted the signs just after 9 p.m. and took pictures. At first she thought it was a PR campaign for the new Godzilla movie.

Paul Indelicato of Pacific Highway Rentals told SFGate that the digital signs were set up in order to warn drivers about street delays for the Bay to Breakers race on Sunday.

"It kind of fits with the theme," he said. "We kind of smiled at each other when we got the phone call this morning."

SFGate reported that by Thursday morning the message was changed to, "It's Too Damn Hot" and "City Closed."

So far, there's no word on who the prankster might be.