A person was struck and killed by a Metro-North train Monday - the third such incident in a week.

Two of the three happened at a railroad crossing at Hudson and Railroad avenues in Peekskill.

On Monday morning, a 19-year-old teen died after stepping onto the crossing as a train passed.

Exactly a week ago, a 59-year-old Peekskill woman did the same. Last Wednesday, a 34-year-old man in Dover Plains, died in the same manner.

All three are being considered suicides.

Stephen Ferrando, Westchester Medical Center's director of psychiatry, says these tragedies are a very decisive act.

"It's a very final type of act, there is no in-between. In all likelihood, one is expecting that they are going to end their life in that moment," he says

He also says colder months tend to play a factor in mental health.

"We haven't had the cold this winter, but still these months tend to be very difficult in terms of low mood and depression," he says. "It's possible that an individual who is suffering might see the method utilized by another individual and make use of that mechanism."

The railroad crossing in Peekskill has many signs and markings that alert people to the dangers.

Ferrando says it's about making sure those who are suffering get the help they need.

A Metro-North spokesperson said in a statement: "This is a human tragedy. If you notice any concerning changes in loved ones, don't ignore them. Start a conversation and assist in finding help."