A federal grand jury on Wednesday indicted a man who the authorities say killed 11 people in a Pittsburgh synagogue while spewing anti-Semitic slurs on 44 counts, including hate crimes. He could face the death penalty.

The indictment, handed up by a federal grand jury in western Pennsylvania, charges Robert Bowers, 46, with 11 counts of obstruction of free exercise of religious freedom resulting in death, and 11 counts of using a firearm during a crime of violence.

The maximum penalty Mr. Bowers could receive if convicted is death, or life without parole plus 535 additional years of imprisonment.

Mr. Bowers also faces state charges including 11 counts of criminal homicide and 13 counts of ethnic intimidation.