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Three men and a teenage girl have been arrested in an unprovoked attack on a pedestrian near Boston Common Friday, the second such random assault in the area in three nights, authorities said.

A group of seven people attacked a man wheeling a suitcase up Tremont Street toward Bromfield Street about 10:30 p.m. Friday, authorities said. The victim, who was not identified and was accompanied by a female companion, was punched in the face, knocked to the pavement, and then kicked by the juvenile while on the ground, police said.

The victim’s companion attempted to come to his aid but was thrown out of the way by the assailants, police said. The attack spilled over into the middle of Bromfield Street and brought traffic to a standstill.


Police responded to the assault after being notified by a plainclothes officer who witnessed the attack, authorities said.

The assailants fled down Bromfield Street after they heard the police sirens.

Boston police detectives were conducting drug investigations near Boston Common and Downtown Crossing, which had seen a rise in robberies and assaults in the days before the attack.

Ayanle Mohamed, a 24-year-old Charlestown man, was arrested on nearby Province Street after a brief chase. The three other suspects were arrested in an entrance to the MBTA’s State Street Station, police said.

Before the arrests, the officer heard the female juvenile, a 17-year-old from Dorchester, say, “You got him good,” to one of her male companions, authorities said.

As the officer attempted to take the three suspects into custody, Liban Dualle, a 21-year-old from Roxbury, became aggressive, screamed obscenities, and reached toward his waistline.

After Dualle refused to obey orders to keep his hands visible, police said, he was taken to the ground and arrested.

The juvenile was arraigned Monday at Boston Juvenile Court on charges of assault with a dangerous weapon, her foot, and held on $25,000 cash bail pending a court appearance on May 5.


Mohamed, Dualle, and Nur Hersi, a 23-year-old from the South End, were freed on bail Monday and were scheduled to be arraigned Tuesday in Boston Municipal Court.

Mohamed is expected to be arraigned on charges of possession of cocaine and marijuana, as well as assault and battery and disorderly conduct, authorities said. Dualle and Hersi are expected to be charged with assault and battery, and disorderly conduct.

The assault occurred two nights after a group of up to 20 males and females launched at least six unprovoked attacks on people on Boston Common and nearby, police said.

Brian MacQuarrie can be reached at macquarrie@