Wong was participating in a training exercise at 348 S. Main Street near Hotel Barclay on Saturday when he fell off the ladder shortly before 9:45 a.m., according to the Los Angeles Fire Department.

He was rushed to a hospital in critical condition immediately following the incident.

Wong died early Monday, according to the Fire Department.

The firefighter, whose name has not been released pending notification of his family, was transported to a trauma center, officials said.

David Caswell and his wife live within view of the Barclay Hotel, where firefighters often train using an aerial ladder to swiftly scale the side of building.

Around 10 a.m., Caswell said, his wife saw the firefighter fall from what appeared to be about five stories.

Firefighters from several department extinguish an ambulance fire outside the emergency room at Brookhaven Memorial Hospital Medical Center in East Patchogue on Friday, June 2, 2017, Suffolk County fire officials said.  There were no reported injuries.