( CNN ) -- A lockdown at an Ohio college was lifted Friday evening , hours after school officials received a `` threat of violence , '' the college 's website said . The alert began around 11:30 a.m. Friday , after a letter sent to a College of Mount St. Joseph administrator threatened violence at the Cincinnati school , according to Delhi Township Police Lt. Darryl Haussler and college spokeswoman Betheny Herr . `` That is when we took action to put the entire campus community into lockdown mode , '' Herr said . The school initiated its emergency plan -- including communicating to students , faculty and staff via Twitter , Facebook and text messages . According to a message on the school 's website , the order for students , faculty and staff at the college to remain where they were went out at 12:49 p.m . Hours later , the campus was secured and the college posted on its website that `` operations are back to normal . '' `` Safety is the very first priority , '' said Herr , adding that there was no evidence of violence or injuries found on the campus . Campus police will remain present to maintain safety , according to the website . The Delhi Township Police Department was among the agencies -- along with the Green Township Police Department and Hamilton County Police Association -- working with the College of Mount St. Joseph police to investigate the threat , escort people off campus and secure the campus , Haussler said . Classes will be back in session Saturday , the school said . The College of Mount St. Joseph is a Catholic liberal arts institution for 2,400 students -- 1,200 undergraduates and the rest in professional education programs -- located in Cincinnati , in southern Ohio . CNN 's Leigh Remizowski contributed to this report .
NEW : Lockdown is lifted , classes will be back in session Saturday , school website says . A letter to a college administrator threatened violence Friday , a spokeswoman says . There have been no reports of violence or injuries , Betheny Herr adds .