Police investigate a crime scene outside of Nordstrom, where a man reportedly stabbed several people in the morning on the sidewalk, Tuesday, July 9, 2019, in downtown Seattle. Police say a suspect is in custody. Streets were closed near the scene as the investigation continues. (AP Photo/seattlepi.com, Genna Martin)

SEATTLE (AP) — Three people were stabbed at random in downtown Seattle, and a suspect is in custody, authorities said.

Seattle Police responded to a call about 10 a.m. Tuesday. Police said in a blotter post that a 79-year-old man who was stabbed in the neck and a 77-year-old man who was stabbed in the back were taken to Harborview Medical Center. Hospital spokeswoman Susan Gregg, who updated the older man's age, said at 5 p.m. Tuesday that he was in serious condition while the other man was satisfactory.

Another man was stabbed in the forearm and treated at the scene, police said.

Christopher Morisette, 29, was arrested a couple blocks away, according to police. Officers recovered a knife he had discarded in the back of a package delivery truck as well his clothes, which he removed as he fled, police said.

"We do believe this was an unprovoked, random attack," said Seattle Police Sgt. Sean Whitcomb, spokesman for the department.

Police booked Morisette into jail for investigation of assault and a state Department of Corrections violation.

It wasn't known if Morisette has a lawyer.

Morisette has spent time at the state's largest psychiatric hospital and was sentenced to 45 days in jail after a December attack on a woman at another mental health facility, KIRO-TV reported .

James Sido, a spokesman for the Downtown Seattle Association, said in a statement that "everyone deserves to feel safe in the heart of our city, and we clearly have more work to do to make that a reality."

Seattle Fire Department personnel work at a crime scene outside of Nordstrom, Tuesday, July 9, 2019, in downtown Seattle. Authorities say several people were stabbed in downtown Seattle and a suspect is in custody. Streets were closed near the scene as the investigation continues. (Genna Martin/seattlepi.com via AP)
A man cleans up blood from the sidewalk outside of Nordstrom, where a man reportedly stabbed several people in the morning on the sidewalk, Tuesday, July 9, 2019, in downtown Seattle. Authorities say a suspect is in custody and the suspect's clothing and a knife were recovered nearby. (Genna Martin/seattlepi.com via AP)
First responders converge at a crime scene in the morning outside of Nordstrom, where a man reportedly stabbed several people on the sidewalk, Tuesday, July 9, 2019, in downtown Seattle. Police say a suspect is in custody and the suspect's clothing and a knife were recovered nearby. (Genna Martin/seattlepi.com via AP)
Media gather at the corner of 6th and Pine St. in downtown Seattle, where several stabbings occurred Tuesday, July 9, 2019. Via Twitter, police said two people were transported to a local hospital, including a 75-year-old man who was in stable condition. The suspect was apprehended shortly after the stabbings. (Ellen M. Banner/The Seattle Times via AP)
Seattle Police Department PIO Sean Whitcomb, left, talks about several unprovoked stabbings that occurred in downtown Seattle, Tuesday, July 9, 2019. Via Twitter, police said two people were transported to a local hospital, including a 75-year-old man who was in stable condition. The suspect was apprehended shortly after the stabbings. At right is Seattle Fire Department PIO Kristin Tinsley. (Ellen M. Banner/The Seattle Times via AP)