Details have increasingly emerged about the man killed in the Tesla cybertruck explosion outside the Trump International Hotel in Las Vegas on New Year’s Day.

At a news conference Thursday, Las Vegas Sheriff Kevin McMahill said the coroner’s office suspected the man died by suicide before the explosion.

“The subject had sustained a gunshot wound to the head prior to the vehicle detonation,” McMahill told reporters. He added that a pistol was found at the man’s feet.

Earlier in the day, news outlets including The Associated Press and AFP identified the man as an active-duty soldier named Matthew Livelsberger.

Citing unnamed military officials, the news outlets said Livelsberger was on leave from his post with the U.S. Army Special Operations Command.

He was a highly decorated Green Beret who had served in the U.S. military in various capacities since 2006, including in Afghanistan, Ukraine and Tajikistan.

But on Wednesday, Livelsberger was allegedly found dead in the burning Tesla Cybertruck on the circular driveway outside the hotel’s glass doors.

Seven other people were injured when the Cybertruck exploded, and there are few details about the circumstances surrounding the explosion.

Kenny Cooper, a special agent with the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives, said he was surprised that a military member was involved in the explosion, which caused little damage other than to the Cybertruck.

“The level of sophistication is not what we would expect from a person with this type of military experience,” Kenny Cooper said.

Initial investigations indicate that the Cybertruck was carrying fireworks and fuel canisters when it exploded.

The Trump International Hotel Las Vegas is named after President-elect Donald Trump, a co-owner of the property who will take office in the White House for a second term on January 20.

In a brief statement Thursday, the Federal Bureau of Investigation (FBI) said investigators had searched a home in Colorado in connection with the incident, but gave no further details.

“FBI Denver; the Denver Field Division of the Bureau of Alcohol, Tobacco, Firearms, and Explosives; and the Colorado Springs Police Department are conducting law enforcement operations at a residential address in Colorado Springs,” the statement said.

“FBI Denver employees and special teams will be on site for several hours. This activity is related to the explosion in Las Vegas on Wednesday.”

The explosion came on the same day as a deadly car bombing in the southern city of New Orleans that killed at least 15 people, including the suspect.

An official estimate on Thursday said at least 35 other people were injured in the attack. This incident is being investigated as a terrorist attack and improvised explosive devices (IEDs) were reportedly discovered in coolers left on the street at the scene.

However, authorities have failed to link the two incidents.

At a news conference on Thursday in New Orleans, Christopher Raia, deputy assistant director of the FBI’s counterterrorism division, emphasized that he had not yet found a connection.

“We are investigating all potential leads and are not ruling everything out,” Raia told reporters. “However, at this time there is no definitive connection between the attack here in New Orleans and the one in Las Vegas.”

Law enforcement initially believed that the suspect in the New Orleans attack, 42-year-old Shamsud-Din Jabbar, had received help from others.

But on Thursday, Raia said authorities now believe Jabbar acted alone. “We are confident at this point that there are no accomplices.”

He said the initial reports of accomplices were likely spurred by witnesses who reported passers-by examining the two coolers containing the IEDs without knowing what was inside.

Jabbar was ultimately shot after getting out of his vehicle and opening fire on police.

Both the New Orleans car crash and the Cybertruck explosion in Las Vegas involved vehicles rented through the car rental app Turo.

Livelsberger and Jabbar were also both military veterans who spent time at Fort Bragg, a military installation in North Carolina now known as Fort Liberty.

However, an anonymous official told the Associated Press that the two men were not stationed at the base at the same time.