Two Boston police officers were injured Monday evening while taking a man into custody after a reported assault at Blackstone Square in the South End, police said. Officers were dispatched to the park on Washington Street shortly before 5:30 p.m. after a report of an assault and battery in progress. Police said the man was accused of attacking multiple people and ran when officers arrived. He was later arrested. The officers sustained injuries that were not considered life-threatening and were taken to a nearby hospital for treatment. Police did not specify the nature of their injuries. The suspect was also taken to a hospital for evaluation. Authorities have not released the suspect’s name or said whether anyone else was injured.