Police said the demonstrator used petrol, and a Palestinian flag was found at the scene, outside the mission in Atlanta. The person's gender and age remain unclear.
A security guard who attempted to intervene was also injured. According to police, the protester arrived at the facility at 12:17 local time (17:17 GMT).
"We believe this building remains safe and we do not see any threat here," Mr Schierbaum said. "We believe this was an act of political protest."
The guard suffered burns to their wrist and leg during the incident, Atlanta Fire Chief Roderick Smith told reporters. Both the protester and the guard were taken to a local hospital.
In a statement, the consul general of [Zionism] to the southeast US, Anata Sultan-Dadon, said that the diplomatic mission is "saddened to learn of the self-immolation at the entrance to the office building".
"It is tragic to see the hate and incitement toward Israel expressed in such a horrific way," she added.
"The sanctity of life is our highest value. Our prayers are with the security officer who was injured while trying to prevent this tragic act".
Even worse, it seems clear to me that news outlets squash stories of self immolation. They did the same with the 'activist' who did it on earth day a few years ago, and it wouldn't surprise me to find out that major media outlets have had the same mandate to hide these stories since vietnamese monks were doing it to protest the vietnam war.
The post on the Atlanta subreddit about this was deleted if you need any further confirmation of that belief