A former University of Alaska Anchorage student was arrested Sunday after Anchorage police say he threatened a mass shooting on campus. 

Police say around 10 a.m., a UAA student contacted authorities about threatening text messages she received from her ex-boyfriend, 21-year-old Ralph Marcelo. 

"It was discovered that an adult male, confirmed to be a former UAA student, had sent several text messages containing suicidal threats that quickly evolved into threats of a mass shooting on UAA campus," APD wrote in a statement Sunday afternoon. 

UAA's Incident Management Team was notified and officers with the Patrol Division responded to Marcelo's home where he was taken into custody without incident, police say. 

He was remanded at the Anchorage Jail on charges of terroristic threats in the second-degree, which is a class C felony. 

APD says they take these kinds of threats very seriously and thanks the student who immediately contacted authorities after receiving the texts.  

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