EAST PROVIDENCE, R.I. (WPRI) — East Providence High School was placed on lockdown Thursday afternoon after there was a stabbing involving two students.

According to East Providence Police Chief Christopher Francesconi, a 17-year-old boy stabbed a 16-year-old boy in a bathroom.

The victim was treated at the scene for serious injuries, then taken to Hasbro Children’s Hospital. Franesconi said he was stable at last check.

Police responded to the school around 12:25 p.m. after they were contacted by the school resource officer. Franesconi said it was already on lockdown by the time he arrived.

Responding officers were able to “very quickly” identify and arrest the suspect, according to the chief. He said police are still working to figure out what led up to the stabbing, but they don’t believe anyone else was involved.

Story continues below video.

“At this point of the investigation, we believe he was the only person involved in the stabbing,” Franesconi said of the suspect.

“As a parent who has a student at East Providence High School, I can’t commend the East Providence Police Department enough in how to handle this incident and how quickly they brought it under control,” Mayor Bob DaSilva said during a news conference Thursday afternoon.

“It breaks my heart to hear something like this happening in our community,” he added. “We have a strong sense of community in East Providence, so this really hurts me as a parent, and as a resident, as the mayor.”

All after-school activities were canceled on Thursday, with the exception of games being held off campus. Superintendent Dr. Sandra Forand said there will be an increased police presence at the school on Friday, as well as support for anyone who needs it.

“We’re always having conversations about how to keep our students and staff safe, and we will continue those conversations,” Forand added.

Watch the full news conference below.