The man who died after setting himself on fire on a lawn near the White House on Wednesday was hallucinating at the time after taking the drug K2 that had been laced with PCP, according to police sources. 

Arnav Gupta, 33, was identified by US Park Police on Thursday after dying in the hospital. 

He had been reported missing by his family around the time that he was seen setting himself on fire on a lawn at Ellipse Park near the White House. 

Gupta was from Bethesda, Maryland. His motive for the deadly stunt remains unclear. 

On Thursday, TMZ cited unnamed police sources who said he was hallucinating on K2 - a form of synthetic marijuana - and that he had also taken Phencyclidine. 

Phencyclidine is commonly known as PCP or angel dust. It is known to cause hallucinations.