The four men killed in Tuesday’s synagogue attack in Jerusalem were, according to Israeli police spokesman Micky Rosenfeld: Rabbi Aryeh Kopinsky, 43; Rabbi Avraham Shmuel Goldberg, 58; Rabbi Calman Levine; and Rabbi Moshe Twersky, 59.

Three of the men killed in the attack were dual Israeli-U.S. citizens, and the fourth was a dual British-Israeli citizen. The attack is ostensibly in response to a Palestinian bus driver’s death, but no one has responsibility. The FBI is investigating because three of the victims were U.S. citizens.