DETROIT (WXYZ) — Detroit police say a man walked into Henry Ford Hospital in Detroit on Friday morning and shot and killed his ex-wife in the basement of the facility.

Here's what we know about the investigation:
The hospital was placed on lockdown earlier, but that lockdown has since been lifted, a hospital spokesperson confirms to 7 News Detroit. The hospital is located at 2799 West Grand Boulevard.
Police are currently looking for 53-year-old Mario Green, who they say left the hospital in a 2011 white Dodge Charger with license plate DXC7067 after shooting the victim. The suspect was described as wearing all black and a gold chain.
Viewer video from inside the hospital while the hospital was on lockdown
Police say the victim, reported to be about 40 years old, was an employee at the hospital.
According to police, the victim had filed for a personal protection order against the suspect about a month ago.
Officials do not believe there were any other shooting victims.
Related Video: Shooting reported at Henry Ford Hospital, suspect on loose
Green is presumed to be armed and dangerous. Police say he has an address in Detroit.
"We expect to have him in custody very, very shortly," said DPD Chief Todd Bettison.
We spoke with one woman who was inside the hospital during the lockdown; she described the situation as "horrible."
"When you're in a room and ... they tell you can't leave and if somebody's shooting, you just, you just don't know, and your life just start flashing, you know, in front of your eyes, so it's like 'my children, my family, oh God, I need to make it home.' I'm just glad to be out of there and prayers, prayers to her family. That's horrible.That's a horrible thing, said Tasheena Stephens.
Henry Ford Health has released the following statement regarding the incident:
"At Henry Ford Health, we are family. We are devasted by the loss of our Henry Ford Hospital teammate and our hearts go out to her loved ones—her family, friends, and the people she worked with every day. Police have confirmed this was a targeted act of domestic violence. At this time, all questions regarding what occurred should be directed to the Detroit Police Department. We are cooperating with their investigation and are conducting our own internal investigation as well.
We understand this tragedy is wide-reaching and we recognize and sympathize with the pain this has caused. We are providing resources to our team members who are dealing with the impacts of this tragic incident. The safety and well-being of our patients, visitors, and team members is our greatest priority.
The hospital is back open to all patients and visitors."
Stay with WXYZ.com for updates on this developing story.