Quincy high school students arrested after allegedly attacking Duxbury teens at Kenmore MBTA station

MBTA Transit Police responded to a call about an assault at the Kenmore Station earlier this month. (Nancy Lane/Boston Herald)

Three Quincy teenagers are accused of a “brutal and unprovoked attack” on a group of Duxbury teenagers at the Kenmore Square MBTA station, in which the victims suffered facial injuries, police said.

According to the Suffolk County Prosecutor’s Office, an 18-year-old and two 17-year-olds were arrested and charged in connection with the alleged attack earlier this month.

MBTA Transit Police responded to the Kenmore T station for a reported assault at approximately 10:14 p.m. after the Sox game on Friday, May 10th. Police officers spoke with the four Duxbury teenagers who said they were attacked by a group of unknown people.

Three of the teens were bleeding from the mouth and the fourth had blood on his clothing and knuckles, police said.

One of the alleged attackers lifted up his sweatshirt and showed a knife in his waistband, the victims told police. They were then reportedly beaten and thrown to the concrete floor. One of the victims reported that his jacket and sneakers were stolen.

MBTA police found the jacket nearby and it was destroyed, police said.

Police then reviewed T station video and cell phone videos that showed the victims being attacked by 18-year-old Aidan McGuinness, the two juveniles and two other people who have yet to be identified. The video confirmed the victims’ account of the attack. The victims also provided descriptions of the alleged attackers.

In the video, McGuinness can reportedly be seen pushing one of the victims while the victim is being punched by another attacker. McGuinness and others can be seen hitting the victim on the ground several times. McGuinness also reportedly took the victim’s jacket.

Police were helped in identifying the suspects by a person who saw a Snapchat video of the attack that was sent to about 60 people. The viewer recognized McGuinness and other attackers as high school students from Quincy.

“These individuals may have thought they could launch a brutal and unprovoked attack on a group of young people and get away scot-free, but the persistence of traffic police combined with the help of the victims, the public and video and social media evidence enabled them to do so Proved otherwise,” said Suffolk District Attorney Kevin Hayden.

“These victims endured a horrific experience and suffered serious injuries while doing nothing but enjoying an evening in Boston,” the prosecutor added. “Their attackers will be held accountable for their actions.”

McGuinness was charged with unarmed robbery, assault and aggravated assault. The judge set bail at $1,500 and ordered McGuinness to stay away from the victims.

One of the 17-year-olds was charged with two counts of assault with a dangerous weapon (knife), one count of assault causing serious bodily harm, one count of unarmed robbery and one count of assault and battery. The other juvenile was charged with assault with a dangerous weapon (cement floor), assault and unarmed robbery.

The judge ordered both teens held on $200 bail and also ordered them to stay away from the victims and the Kenmore MBTA station.