Update 10pm: US police are searching for a young man suspected of killing two people at a central Michigan University residence hall on the same day parents were arriving to pick up students beginning their spring break.
Police released a photo of James Eric Davis Jr, urging the public to call 911 if they see him but also warning that the 19-year-old should not be confronted.
The campus was locked down, and students and staff were told to find shelter.
NEW: Victims in fatal shooting at Central Michigan University were the suspect's parents, @WWJ950 reports. The suspect remains at large, according to police. https://t.co/e5ktDziHFM pic.twitter.com/Ije3mrimEl— CBS News (@CBSNews) March 2, 2018
"He should be considered armed and dangerous," campus police spokesman Larry Klaus said.
The shooting occurred at Campbell Hall, a residence hall at Central Michigan, which is about 70 miles north of Lansing. Police described the shooting as a "family-type domestic situation" and said the victims were not students.
Police declined to confirm news reports that said Davis fatally shot his parents when they came to pick him up for spring break.
Mr Klaus said video at the dorm suggests Davis fled on foot after the shooting. He was wearing a hoodie but had been shedding certain clothes while on the run.
The search was focused on Mount Pleasant neighbourhoods near campus.
Officers in camouflage knocked on doors and checked possible hiding places, such as yards and porches. In the surrounding community, students and staff in the Mount Pleasant school district were told not to leave nine buildings.
Mr Klaus said Davis was taken to a hospital on Thursday night by campus police because of a drug-related health problem, possibly an overdose.
Davis is from Plainfield, Illinois, and graduated from Central High School in 2016, said Tom Hernandez, a spokesman for Plainfield School District 202.
LATEST: Authorities release description of suspect at large in shooting incident at Central Michigan University; suspect considered armed and dangerous. https://t.co/afz1imqCpw pic.twitter.com/PL9rftE9DK— ABC News (@ABC) March 2, 2018
The shooting occurred on the last day of classes before a week-long break. Parents who were trying to pick up students were told instead to go to a local hotel where staff would assist them while the manhunt was ongoing.
A student, Tyler Whipple, was driving through campus when his route was blocked off by police cars at the scene of the killings. He had to catch a flight to Florida.
"These roads are kind of spooky right now," Mr Whipple said.
The school posted an alert on Friday morning on social media about shots being fired at Campbell Hall.
Halie Byron, 20, said she locked herself in her off-campus house, about a 10-minute walk from Campbell Hall.
"It's scary thinking about how easy a shooter can come into a college campus anywhere - a classroom, a library. There's so much easy access," Ms Byron said.
Update - 4:30pm: Suspect sought after two people shot dead at US college campus
Police said two people have been shot dead at a hall of residence at Central Michigan University.
Officers believe the shooting of two people who are not students "started from a domestic situation". Investigators are searching for a 19-year-old suspect who is considered to be armed and dangerous.
The school is urging students to take shelter. It also said no other injuries have been reported.
The school posted an alert on its Facebook page about shots being fired at the campus hall of residence. Friday is the last day of classes before the spring break.
NEW: Two people have been shot at Central Michigan University; suspected gunman is still at large and considered armed and dangerous https://t.co/e5ktDziHFM pic.twitter.com/eJPwTSL6G2— CBS News (@CBSNews) March 2, 2018
3:15pm: Reports are emerging of shots fired at a college campus in Michigan.
Early reports say that police are responding to shots fired at Michigan University state campus near Detroit.
Reports of shots fired on Central Michigan University campus pic.twitter.com/mmYXye4hdG— Ryan Rocca (@Reporter_Ryan) March 2, 2018
More as we get it ...