NEW YORK (AP) — A man with a Tibetan flag in front of the United Nations headquarters in New York set himself on fire and died Thursday, according to officials.

Law enforcement responded to a 911 call at about 6:30 p.m. and found a 52-year-old man with severe burns throughout his body, the New York Police Department said.

The man was taken to the hospital and later pronounced dead, according to police.

Authorities were investigating. Officials were not able to comment on what prompted the man to set himself on fire.

he man’s name has not been released because his family hasn’t been notified yet.

A U.N. spokesperson said the incident happened after all scheduled meetings were finished for the day and no U.N. business was affected.

China says Tibet has been part of its territory for more than seven centuries, and its Communist Party has governed the Himalayan region since 1951. But many Tibetans say they were essentially independent for most of their history and have protested what they regard as Beijing’s heavy-handed rule.