Shortly before 2 p.m. on West Springfield Street between Shawmut Avenue and Washington Street.
One suspect for the shooting of the gang-unit officer was quickly arrested. The second holed up at 89 West Springfield St. After SWAT officers surrounded the building, he surrendered peacefully shortly after 3:20 p.m.
Boston Police report Requon Martin, 21, of Boston, and Antoine Mack, 35, of Pawtucket, RI, were arrested on charges of armed assault to murder, assault and battery with a dangerous weapon, unlawful possession of a firearm, unlawful possession of ammunition, unlawful possession of a loaded firearm and discharging a firearm within 500 feet of a building.
Police did not say which suspect was arrested first and which surrendered only after the building was surrounded by SWAT team members. Both are scheduled for arraignment tomorrow in Boston Municipal Court.