Police responded to a bomb threat at Penn State today, but searches with specially trained dogs found nothing and operations returned to normal.

The threat affected Shields, Borland and Patterson buildings.

According to a university spokeswoman, Shields Building was searched first and cleared at 1:20 p.m. After that police focused on Borland and Patterson buildings, which were also cleared.

Police used bomb dogs to search the buildings, after preliminary searches this morning found nothing suspicious.

According to the university, a "non-credible" bomb threat was received at a generic Penn State email address Saturday night. The email was not opened until this morning.

The threat said there were bombs in Patterson, Borland and Shields, and that the bombs would go off if touched.

Police did not believe the threat was credible, and a preliminary search found nothing of concern. Bomb-sniffing dogs were used to search Shields Building first. The university received assistance from two other agencies' dogs.

Spokeswoman Annemarie Mountz said the email, sent to a general Admissions Office address, was found to be not credible, but was still taken seriously.