AT least four people were killed and 28 wounded in a shooting that erupted during a late-night "Sweet 16" birthday celebration at a dance studio in the small town of Dadeville, Alabama, state police and local news media said. Some of the injured were critically wounded during the shooting in east-central Alabama, about 60 miles (100 km) northeast of the state capital of Montgomery, authorities said. There was no official word on what led to the gun violence. Authorities said the shooting started shortly after 10:30 p.m. CT on Saturday but they declined to answer questions or provide further details…