Around 5 p.m, Boston Police officers captured a man holding what appeared to be a gun in the middle of Rotch Playground at Albany and Randolph streets about seven hours after he first appeared with the weapon.
Police fired a single less lethal projectile at him, after which he was formally put in custody, then rushed to nearby Boston Medical Center for care.
Police started responding to the playground, used by Emerson College's soccer team, around 10 a.m. after the man appeared in the center of the field.
Officers cleared out residential units alongside the field as SWAT teams and hostage negotiators arrived.
The man's family members were brought in to talk to him. Live Boston reports he was identified as Ernest Fields, who was already wanted by BPD on an armed-robbery charge.
SWAT units slowly moved in until he was completely surrounded by them. Negotiations continued for several hours until he was captured.
Michael Ratty, who lives next to the field - and whose wife was among those forced to leave - reports the shutdown coupled with normal rush-hour traffic means Arlington and Herald streets were a mess:
Ratty also saw officers continuing to investigate the scene after the man was transported to the hospital: