Suspect arrested after triple stabbing at park near TechBoston Academy in Dorchester, police say

Boston police arrested one person in connection with a triple stabbing Monday afternoon at a Dorchester park near a public pilot school for grades six to 12, authorities said.

The stabbings were reported at 2:42 p.m. near Armandine and Washington streets, according to Officer Michael Torigian, a spokesperson for the Boston Police Department.

Another spokesperson, Boston police Sergeant Detective John Boyle, confirmed that three victims were stabbed and that one person was in custody. That person’s name wasn’t immediately disclosed.

Boyle said the victims are expected to survive. No other information was released.

In a letter to TechBoston Academy parents and community members, Head of School Patrick Cleary said “a physical altercation took place near the school at a nearby basketball court” following afternoon dismissal.

“School staff and BPS Safety Services noticed the commotion and immediately called 911 and notified Boston Police and Boston EMS to provide assistance. ... A BPD investigation into this incident is ongoing, and we cannot discuss any further details at this time,” Cleary wrote.

The school will have psychologists and social workers on site Tuesday “to provide additional support to any students or staff who may need it.”

Boston Public Schools Superintendent Mary Skipper said the school district will work to support students “as we try to process the effects of violence in our communities.”

“What happened today is incredibly tragic as we continue to see youth violence happening in our community,” Skipper said in a statement. “National and State statistics all remind us of how much our students are hurting. Right now, our focus is on all of the students involved, supporting them and their families, and the school’s students and staff.”

Humayun Morshed, 45, of Dorchester, owns Rosario Grocery at 760 Washington St. He said that at around 2:45 pm, he heard shouting outside and saw a large group of students running from the area of the basketball court across the street.

Video taken from security cameras outside the store shows dozens of students running with their backpacks down a path away from Roberts Playground before crossing Washington Street and continuing down Ashmont Street.

“Everybody was running around. Students came running by us and we heard from them that three students were stabbed,” Morshed said. “I didn’t see any blood, but I heard it was pretty bad.”

The stabbing in the park on Monday came less than a year after a teacher and a 17-year-old student suffered non-life-threatening injuries after they were shot in a parking lot outside TechBoston Academy in March 2022. Two teenage boys were later arrested in connection to the shooting.

Mike Bello of the Globe Staff and correspondent Kate Armanini contributed to this report.