HOLYOKE, Mass. (WWLP) – Multiple people are in the hospital, and an infant is dead after a shooting in downtown Holyoke Wednesday afternoon.

According to Hampden District Attorney’s Office Spokesperson Jim Leydon, just before 1 p.m., members of the Holyoke Police Department were called to a reported shooting in the 100 block of Sargeant Street. Leydon added that three male suspects were involved in an altercation, during which a shooting occurred, and one of the rounds from that altercation struck a public transportation bus and an uninvolved female occupant, who was seated in the bus.

The female occupant, who was pregnant, was treated at a nearby hospital and reported to be in critical condition. The infant, who was delivered, and needed life-saving medical services, tragically passed away, according to officials.

All suspects involved are in custody, and receiving treatment at nearby hospitals. This incident remains under investigation by the Massachusetts State Police Detective Unit along with the Hampden County District Attorney’s Office, and Holyoke Police. We will continue to provide updates, as soon as they become available.

PHOTOS: Holyoke shooting

MAP: Traffic near Sargeant and Maple Streets in Holyoke

This incident happened just hours after the Holyoke Police held a news conference to discuss the amount of gunfire that has been picked up by the ShotSpotter system installed in the city in March. The ShotSpotter program is a detection system that allows police to detect, find, and respond to gunfire.

VIDEO: Footage sent to 22News from a bystander

Holyoke ShotSpotter Report

According to the Holyoke Police Department, in the past 6 months, their ShotSpotter system has detected 113 incidents involving gunfire, 72 of which happened near a playground and 27 near a school, and 110 incidents were reported near a business.

Holyoke police recovered 457 rounds, seven guns, and made 10 arrests. They also identified six victims. Police say that many of these ShotSpotter activations do not generate a 911 call from people in the area.

22News is covering this story and will update as soon as additional information is released.