A teenager thrown to the ground Wednesday when a Central Park carriage horse bolted away from its driver has died, according to police.

The 18-year-old was riding in the horse-drawn carriage with three other passengers when the accident happened just before 3pm, according to the New York police department. At least two passengers were sent flying out of the careening cab.

The teenager was initially hospitalized in critical condition. The other passengers refused medical treatment.

A representative for the Transport Workers Union, which represents carriage industry employees, said the driver had dismounted to take a photograph of his passengers, which they are not supposed to do.

The horse had been in the park for only six weeks, according to Alexander Kemp, the administrative vice-president of the union’s local chapter. He said he wants a full investigation.

“Safety in the park has been a growing concern among many, and improvements are needed to be made with respect to all vehicles, including e-bicycles, delivery vehicles, pedicabs and horse-drawn carriages,” he said in a statement.

Video showed the horse sprinting through the park as two people appeared to jump from the four-wheeled carriage. A second video shows the cab toppling over after clipping the wheels of another carriage on the park’s busy loop.

It’s a fraught moment for Central Park’s 150-year-old horse-drawn carriage industry. The industry has long been seen as a quaint attraction that offers tourists a romantic remnant of a bygone New York, while providing hundreds of jobs to drivers, along with many farm and racing horses. But they are now facing the growing threat of a ban from opponents who say the rides are both inhumane to horses and a danger to city residents.

Wednesday’s event follows several recent horse-related problems in the park, including the fatal collapse of a horse last week.

The Central Park Conservancy, the nonprofit which operates the park and came out last summer in support of banning horse-drawn carriages, said the back-to-back events should bring an end to the industry.

“A young man came to enjoy our park and lost his life,” the group said in a statement. “That is not an acceptable cost of an antiquated industry operating in the middle of one of the most heavily used public spaces in America.”

Central Park is nearly 850 acres and attracts millions of people every year.