FLORENCE — Postal inspectors and UNA police are investigating two threatening letters received within the past two weeks at the university’s Math Building, UNA officials confirmed today.

A letter received last week contained a written message threatening to kill someone, while the second letter — received Monday — contained a .44-caliber, armor piercing bullet, UNA officials said. The second letter did not include a message.

No individual’s name was mentioned as target of the threat, officials said.

There are 13 faculty members working in the Math building along with a staff administrative worker, according to UNA spokesman Josh Woods.

He said UNA police have discussed the matter with faculty members and increased security measures that include increased patrols. Professors have also alerted students about the letters, Woods said.

“Any time a situation like this arises, we take it very seriously while hoping it’s not a threat that is intended to be acted on,” Woods said. “We will continue to treat the matter seriously until the people involved are found and arrested.”