Mayor Eric Adams pushed his controversial involuntary removal plan a day after a shooting aboard a subway train in Brooklyn, saying the incident appeared to have involved a person with “severe” mental health issues.

During an appearance on “Mornings On 1” Friday, Adams tied the shooting — which took place at the Hoyt-Schermerhorn Streets station Thursday afternoon — to the city’s ongoing mental health crisis.

Police said a 36-year-old man was shot in the head and critically injured on board a northbound A train after he got into a dispute with a 32-year-old man, but have not said what led up to the incident. Officers arrested the 32-year-old before he left the platform, the NYPD said.

“I don’t want to go into the thrust of the investigation, but I’m sure as New Yorkers see this unfold, and what we can release, you would see there was a passenger that was merely just minding his business and going, you know, using the transportation like millions of people do, and a person with severe mental health illness, what appears to be severe mental health illness, got engaged in a very violent way,” the mayor said Friday. “But the investigation’s going to take its course.”

“When people look at public safety, they look at the police aspect of it, but there are other connections that must be filled in that are not,” he added. “Such as what we are attempting to do in Albany around dealing with those with severe mental health illnesses, involuntary removals.”

Adams initially introduced his plan to involuntarily hospitalize people displaying severe mental health issues and unable to meet their “basic needs” in November 2022.

A year later, this past November, the mayor said the plan was “working,” noting that 54 people on the city’s list of the 100 “hardest to reach New Yorkers living on city streets” were either in supportive settings or receiving treatment in hospitals.

“When you look at many of these random acts of violence that you’re seeing, you’re seeing that is dealing with people who are dealing with some real severe mental health illness,” Adams said.

The mayor on Friday said the city’s recent increased police presence underground played a role in arresting the 32-year-old man involved in Thursday’s incident, saying the situation could have escalated further without it.

"We should also examine that part of our initiative of having NYPD personnel being in the subway system outside of the transit police personnel. We were able to make a quick apprehension,” he said.

Asked what bystanders could do to “deescalate” an incident like Thursday’s, Adams said they should “attempt not to engage with the person.”

“[What] one should do is attempt not to engage with the person,” he said. “Just attempt to just remain calm and don’t engage with them on the back-and-forth dispute in any way, because you’re dealing with someone that does not seem to be in a proper frame of mind, based on what I saw in that tape.”