The shooter made anti-Jewish comments during the incident, a law enforcement official told CNN.
The shooting took place on the same day as Saturday Shabbat services. Saturday morning services typically begin at 9:45 a.m., according to the immediate past President of the synagogue, Michael Eisenberg.
At the time of the shooting, three different congregations were holding services at the Tree of Life facility, according to Eisenberg.
Tree of Life*Or L'Simcha is a traditional, progressive and egalitarian congregation based in Pittsburgh’s Squirrel Hill neighborhood, according to the synagogue’s website.