Liberty Bell bomb scare brings arrest of ex-college professor

(CBS) PHILADELPHIA - A Tempe, Ariz., man is accused of charges including making terroristic threats after telling security officers he had explosives with him during a visit to the Liberty Bell on Saturday, Philadelphia police said.

The suspect, 41-year-old Carlos Balsas, is a former professor at Arizona State University, CBS Philly reported.

Balsas is charged with making bomb threats and terroristic threats, reckless endangerment and related offenses after he told security personnel, who were checking his backpacks, that they contained explosives, according to police.

Balsas entered the Liberty Bell Center on Independence Mall shortly after 10 a.m. Saturday and was stopped by security and told that he had to have his bags checked. It was at that point, Balsas said "I have explosives in there," and then left the building, authorities said.

CBS Philly reported that National Park Service rangers caught up with Balsas and, after a brief struggle, handcuffed him about a block away. The area was shut down while police detectives and the bomb squad investigated.

No explosives were found.