(Reuters) – A student at Michigan University suspected to death his parents inside a campus dormitory during a domestic dispute was arrested on , the school said, after a daylong manhunt.

The suspect was seen a bystander on a train passing through the north end campus in Mount Pleasant, about 125 miles (0 km) northwest Detroit, shortly after midnight and taken into 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 victims were found inside a residence hall at the university, police said. “It was an isolated incident, we had two people that were killed in a residence facility. That’s traumatic,” Michigan Governor Rick Snyder said at a news conference hours after the Friday morning .

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

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

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

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

Reporting Brendan O’Brien in Milwaukee; Editing Sam Holmes