At least four people died and eight others, including children, were wounded when a crazed gunman attacked a Michigan Latter-day Saints church as services were in full swing — then set a blaze that burned the structure to cinders.

At least two of the fatal victims were shot, while the other two were found dead inside the burnt-out church, officials said in an update Sunday evening.

Authorities warned that they expect to find additional bodies in the charred house of worship as they continue to clear what is left of the building, with multiple people still unaccounted for — likely increasing the death toll.

The search was called off for the day late Sunday evening with plans to pick through remaining debris at the scorched church early Monday morning.

Exactly how many parishioners are still unaccounted for is unknown, officials added. Sources told CNN that up to seven people were still missing, but cautioned this could include survivors who haven’t gotten in touch with their family yet.

Hundreds of worshippers were inside the Church of Jesus Christ of Latter-day Saints in Grand Blanc Township during the shooting, and horrifying pictures showed the entire structure cloaked in flames.

“We do believe there were people up there that were near that fire, and they were unable to get out of the church. So we do believe that we will have additional victims once we’re able to search that,” Grand Blanc Township Police Chief William Renye told reporters.

The gunman, 40-year-old Tomas Jacob Sanford, rammed his truck — which had two large American flags in the bed and deer antlers on the front bumper — through the front doors of the church about 10:25 a.m. and then opened fire with an assault rifle.

Sanford died in a gun battle with a Grand Blanc Township police officer and a Department of Natural Resources officer who responded to the shooting, Renye said. Cops were on the scene 30 seconds after calls started coming in, and took out the suspect in about eight minutes.

Eight victims who sustained gunshot wounds were still hospitalized Sunday night, with one in critical condition, Grand Blanc Township Renye said.

James Deir, a special agent in charge with the Bureau of Alcohol, Tobacco, Firearms and Explosives said that they suspect Sanford started the fire with gasoline, but noted that they did recover “suspected explosive devices” on site. 

Churchgoers reportedly heard a loud bang as the attacker crashed his truck into the church. Congregant Kristin Juarez, 54, who told the New York Times she thought the chapel’s steeple had fallen before gunshots started ringing out in the church, located about 60 miles northwest of Detroit.

She became separated from her husband, and hid in a bathroom until she heard him calling her name. “I thought, ‘If I have to die, it’s OK,’” Juarez said. “I feel good about where I am,” she described her thought process before hearing her husband’s voice.

John Juarez, 57, said he helped fellow church members carry a wounded victim outside and saw someone who had been shot lying on the floor when he went back inside the building. 

“I didn’t know what I could do for him,’’ Mr. Juarez said. “I couldn’t get him out on my own.”

Paul Kirby, 38, who ran outside to render assistance believing the crash to be an accident, told the outlet he spotted Sanford getting out of the truck from about 10-20 yards away before he realized what was happening.

“He started shooting at me,” Kirby said, saying a bullet whizzed through a nearby glass door, clipping his leg with a piece of shrapnel.

He then rushed inside the church to find his wife and two sons before they fled through the back of the church and loaded as many people into their car as they could before speeding away.

“It was the scaredest I’ve ever been,” he told the outlet.

Renye hailed similar acts of heroism, including some congregants helping one another move to safety and even shielding the young children present with their own bodies.

“Just hundreds of people praying their faith. Extreme courage, brave. And that’s the type of community we are,” he said.

Dramatic aerial footage circulating online showed flames ripping through the church and thick black plumes of smoke rising high in the air over the leafy green Flint suburb.

Anna Matson, a podcaster, posted a video on X showing her at the scene of the shooting. According to Matson, witnesses said an unidentified individual drove a vehicle into the church and started shooting.

One of the victims was a young girl who was shot in the back, according to Matson.

Matson reported that she spoke to someone from South America who recently arrived in the United States and attended a church service on Sunday with his mother.

According to Matson, the person managed to get out of the burning church but his mother remained in the building after the fire started.

“A tragic act of violence occurred today at a chapel of The Church of Jesus Christ of Latter-day Saints in Grand Blanc, Michigan,” the church wrote in a statement Sunday afternoon.

“During Sunday worship services a gunman opened fire, and early reports indicate that multiple individuals were injured. We ask for cooperation with local authorities as details become available.”Not motive has been given for the attack. The gunman is an Iraq war vet, who according to social media, had a wife and a young son.”

In the wake of the shooting, multiple other churches in Michigan reported unfounded bomb threats and were cleared by law enforcement, Michigan State Police Public Information Officer Kim Vetter said.

The FBI is leading the investigation, Special Agent Reuben Coleman announced Sunday evening. It is being probed as an act of targeted violence.

“This act of violence has no place in our state or any place in our country,” Coleman said.

Detectives are also probing whether the mass shooting and fire has any connection to the death of longtime national LDS church president Russel M. Nelson, who died Saturday in Salt Lake City at age 101, according to a source briefed on the investigation who spoke to ABC News.