The truck belonging to the man who allegedly crashed into The Church of Latter-Day Saints in Grand Blanc before opening fire on a crowd of worshippers was loaded with explosive devices, authorities said.
The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) told Fox Detroit that there were four IEDs found in Thomas Sanford's truck after it crashed into the church on Monday.
The IEDs were made of consumer grade fireworks and smoke canisters stuck together, the station reported.
White House press secretary Karoline Leavitt provided an update Monday on the FBI investigation into the shooting and fire at a Michigan Mormon church on Sunday.
"Based on my conversations with the FBI director, all they know right now is this was an individual who hated people of the Mormon faith, and they are trying to understand more about this, how premeditated it was, how much planning went into it, whether he left a note. All of those questions have yet to be answered, but certainly will be answered by the FBI," Leavitt told "Fox & Friends" after speaking with FBI Director Kash Patel.
Leavitt said the FBI is "currently executing multiple search warrants at the residences and the family homes of this perpetrator to try to get to the bottom of why he would commit such an act of evil."
Thomas Jacob Sanford was named by authorities as the man who rammed a Chevy Silverado into The Church of Jesus Christ of Latter-day Saints in Grand Blanc Township, Michigan, before opening fire on the hundreds of worshipers gathered there.
The White House press secretary praised local law enforcement for their response to the shooting.
"Local police officers were on the ground of this scene within minutes and neutralized this shooter, no doubt saving lives, and they should be commended. Our police officers are heroes and this president will always respect them and support them," Leavitt continued.