The women, 79, remains in the hospital with cranial damage and loss of blood after being injured Tuesday outside the center in the 11th district.
The National Bureau for Vigilance Against Anti-Semitism, or BNVCA, on Friday said its investigation concluded the injury was the result of a young boy dropping the ball from an upper-floor apartment. The ball, about the size of a peach, is used in the bowling game petanque.
“The parents of this child discovered what had happened and called the synagogue’s administrators to offer the sincerest apologies,” BNVCA wrote in a statement.
CRIF, the umbrella group of French Jewish communities, on Twitter had characterized the woman’s injury as the result of a “violent assault,” labeling under the hashtag “anti-Semitism.”