Parishioner Damane Mitchell, who was standing inside the church when gunfire erupted from an alley across the street, was also shot. Mitchell's head was grazed by a bullet and he sustained a minor scratch.
Mitchell was at the church to attend his best friend's wedding. The wedding was one of several events held at the church Sunday, including a 25th anniversary celebration for Pastor Roosevelt Watkins.
Police said the bullets were likely intended for the 17-year-old, who limped into the church for cover. The incident may have been motivated by a gang dispute, police said.
Watkins has led efforts to stop the violence in his community. He said this is the first time the violence struck so close to home.