(Reuters) – student at Central Michigan University of shooting death his parents inside campus dormitory during domestic dispute was arrested on Saturday, the school said, after daylong manhunt.

The suspect was seen by bystander on train passing through the north end of campus in Mount Pleasant, about 125 miles (200 km) northwest of , shortly after midnight and taken custody without incident, said Heather Smith, a university spokeswoman, in a statement.

The suspect was identified as James Eric Davis Jr., 19, after the two were found inside a residence hall at the university, police said. “It was an isolated incident, but we had two people were killed in a residence facility. ’s traumatic,” Michigan Governor Rick Snyder said at a conference after the Friday morning shooting.

The shooting led authorities a lockdown of the campus, which has more than 20,000 students, and police also warned Mount Pleasant residents be on guard.

Police in helicopters and patrol spent Friday scouring the locked down campus and the area the suspect, local reported. Police escorted people leaving the campus, as university events were canceled and Saturday classes were called off, university officials said in a statement.

Davis had been taken a local hospital on Thursday night after an apparent overdose or“bad reaction drugs,” Klaus told reporters. The two were James Davis Sr. and Diva Davis, both 47, university officials said on .

James Davis Sr. was a police officer in Bellwood, Illinois, a Chicago suburb, Emanuel Chris Welch, an Illinois state lawmaker, said in a post on . The incident came just over two after 17 students and educators were killed by a 19-year-old gunman with an assault-style rifle at a Florida high school.

Reporting by Brendan O’Brien in Milwaukee; Editing by Sam Holmes