The man suspected of opening fire on a Michigan LDS church on Sunday was a 40-year-old veteran of the Iraq War, according to officials.

Police said the suspect, Thomas Jacob Sanford, drove his truck into The Church of Jesus Christ of Latter-day Saints in Grand Blanc, Michigan, before firing shots and setting the building on fire.

Sanford was killed in a shootout with police, officials said. At least four churchgoers were killed, and eight others were injured in the attack.