The FBI is looking into the Michigan church shooting and fire as an incident of targeted violence. 

Authorities identified ex-Marine Thomas Jacob Sanford, 40, as the suspect who allegedly smashed a pickup truck into the Church of Jesus Christ of Latter-day Saints in Grand Blanc, opened fire and set the building ablaze during a crowded Sunday service. 

Police killed Sanford after he allegedly killed at least four people and wounded eight. Authorities said he was from the neighboring small town of Burton.  

“I can confirm at this time that the FBI is now leading the investigation and is investigating this as an act of targeted violence,” Reuben Coleman, acting special agent in charge of FBI Detroit Field Office, said on Sunday. 

A vehicle that was rammed into the building is surrounded by smoke as a firefighter works on the scene at the Church of Jesus Christ of Latter-day Saints in Grand Blanc, Mich., Sunday, Sept. 28, 2025.  (Lukas Katilius/The Flint Journal )

Grand Blanc Township Police Chief William Renye told reporters more victims could be found as searchers made their way through the entire church. One of the wounded people was in critical condition Sunday evening and the seven others were stable, The Associated Press reported.

Attendees hold their lit candles during a vigil for a nearby church shooting held at Holy Redeemer Church in Burton, Mich., Sunday, Sept. 28, 2025.  (Jose Juarez)

Sanford’s motive is not yet clear. Investigators were searching Sanford’s home, but authorities did not say what they found or provide any additional details about him, including whether he was a member of The Church of Jesus Christ of Latter-day Saints, widely known as the Mormon church.

The Associated Press contributed to this report.