New York has the sixth most school shootings involving an injury or death out of any state in the U.S. since 1970, according to U.S. News and World Report.

On Monday, a study was published in the peer-reviewed medical journal JAMA Pediatrics that takes a look at what types of firearms adolescents use in school shootings, and how they obtain them.

The study analyzed 253 school shootings carried out by 262 adolescents from 1990 to 2016. It found the weapons used are mostly low and moderate firearms that were mostly stolen from family members.

According to the study, a little more than 50% of the guns used were taken from family. Thirty percent were bought from illegal gun markets, and a little more than 20% of the shooters received the guns from friends or acquaintances.

With the rise in school shootings, more psychologists are helping children deal with traumatic experiences. One explained how she does it.

“It’s really about guiding them and pacing them through learning about what this experience has meant to them, how did it impact them, what are things that are feeling particularly hard since this thing happened to them," said licensed clinical social worker Lindsay Rowe.

The study found more than half the shooters were Black; 28% were white; and less than 10% were Latino.

It also looked at their economic backgrounds and found one-fifth of the adolescents lived below the poverty line, while 26% of the people they lived with didn’t have high school diplomas and 10% were unemployed.

The study also found adolescents were responsible for seven mass casualty shootings, defined as a shooting that caused four or more gunshot deaths.

Of the 253 shootings analyzed in the report, 119 caused at least one death.