SAN ANTONIO -- A promotional campaign for an upcoming movie prompted the evacuation of one local television station and some anxious moments across the city.

San Antonio police, along with the fire department and the bomb squad, were called to KENS-TV at 5400 Fredericksburg Road Tuesday morning after a viral marketing campaign item was delivered to the station to promote "The Dark Knight." The building was evacuated for a brief time as bomb squad officials investigated the cake's contents.

"The intent was not to harm or cause an alarm," SAFD Lt. Joe Rios said. "It just went bad on them."

The cake, also delivered to KSAT 12, was delivered in a white box and had a cell phone charger coming out the bottom of a cake with a hollow center. Attached to the cable was a cell phone inside a plastic bag that contained promotional materials for the upcoming film.

An e-mail and video clip, also part of the viral campaign, were sent to local media warning the Spurs Coyote had been kidnapped.

"It was just to literally get the anchors and DJs and people like that excited about it," Santikos Theaters spokeswoman Meghan Vincent said.

The fire department's arson bureau opted not to file charges in the case, but suggested to Santikos officials they re-think further promotional campaigns.