A Tesla Cybertruck exploded outside the Trump International Hotel in Las Vegas on Wednesday morning, killing the driver and injuring at least seven other people, the authorities said.

On Thursday, military officials identified the driver as an Army master sergeant who had been on leave from active duty.

The authorities are still working to determine exactly what happened, and why. Here is what we know so far.

What happened on the morning of the explosion?

At about 8:40 a.m. local time on Wednesday, the Las Vegas Metropolitan Police Department received a report of an explosion at the Trump International Hotel in Las Vegas, a 64-story tower on Fashion Show Drive, which is just off the Las Vegas Strip.

A rented 2024 Tesla Cybertruck had “pulled up to the last entrance doors of the hotel,” according to Sheriff Kevin McMahill, before it exploded. Witnesses saw the vehicle engulfed in flames as it sat in front of the hotel.

After firefighters extinguished the blaze, the authorities said that they found gasoline canisters, camp fuel canisters and large firework mortars in the back of the truck; they said they did not know how the explosion had been ignited.