Temple University is dealing with a sadly familiar situation this week: Another student death.

Junior Daniel Duignam, 21, was shot and killed in his Diamond Street apartment on Saturday, police said. It marks the sixth student death of the 2017-2018 academic year. Duignam, of Northampton County, was found by authorities in his off-campus suffering from multiple gunshot wounds. Sources say he called 911 before he died, telling the dispatcher he could not breathe.

The motive for Duignam's killing is still unknown, but police said in a press conference Monday that his apartment was ransacked and money was taken. Authorities believe he knew his killer: There was no evidence of forced entry into the apartment, and the suspect locked the door on the way out of the apartment. The most recent incident is the latest blow to the Temple University community, following five equally tragic deaths that began just as the school year got underway.

On Oct. 3, freshman engineering major Richard Dalcourt died after a fall from his dorm room. Dalcourt, 19, of Plainsboro, N.J., suffered multiple blunt impact injuries. The Philadelphia Medical Examiner's Office ruled his death a suicide.

Days later, Cariann Denise Hithon, 22, of Bowie Maryland, was shot and killed by Miami Beach Police after she struck an officer with a vehicle. Hithon, who was pursuing a bachelor's degree in political science at Temple, was caught on video accelerating toward an officer, hitting him with the vehicle. That incident happened on Oct. 8.

Weeks later, Michael Paytas, 24, and James Orlando, 20, both died from accidental drug intoxication on Nov. 27 and Dec. 2, respectively. Duignam's death comes just days before graduation, which is scheduled for May 10.