Hillary Clinton had a “medical episode” that required her to leave a 9/11 commemoration ceremony early on Sunday, a law enforcement source who witnessed the event told Fox News.

Related Image

Expand / Contract

Democratic presidential candidate Hillary Clinton attends the 2016 ceremony at the Sept. 11 memorial in New York. (AP)

The Democratic presidential nominee appeared to faint on her way into her van and had to be helped by her security, the source said. She was “clearly having some type of medical episode.”

After more than an hour of radio silence, Clinton’s campaign issued a statement saying the former Secretary of State „felt overheated.“

„Secretary Clinton attended the September 11th Commemoration Ceremony for an hour and thirty minutes this morning to pay her respects and greet some of the families of the fallen,“ Clinton spokesman Nick Merrill said. „During the ceremony, she felt overheated so departed to go to her daughter’s apartment, and is feeling much better.“

A senior aide told Fox News „she is fine.“

But a witness told Fox News that Clinton stumbled off the curb, her „knees buckled“ and she lost a shoe as she was helped into a van during her „unexpected early departure.“

The NYPD was sent to retrieve Clinton’s shoe, NBC reported.

Related Image

Expand / Contract

Hillary Clinton departs the 9/11 ceremony on Sunday.(AP)

An unverified video of the episode appeared to show Clinton collapsing as she was helped into the van.

The New Jersey resident who took the video, Zdenek Gazda, told Foxnews.com he had been a fireman in the Czech Republic and came to the 9/11 ceremony to pay his respects.

„Everything was fine, everything was good before,“ said Gazda, who snapped several shots of Clinton before taking the video. „I take a lot of pictures of her. She looked very nice and everything, and I don’t know what happened to her.“

After Clinton left the ceremony, the reporters following her on the campaign trail were prevented from leaving the media area for a period of time.

Clinton emerged from Chelsea Clinton’s apartment just before noon and said she was „feeling great.“

„It’s a beautiful day in New York,“ Clinton yelled to press waiting across the street.

She bent down to take a photo with a young girl and said „thanks everybody“ to a nearby crowd cheering her. Asked again about her health, Clinton said she was „great, feeling great“ and then got into her van. A spokesperson said she was headed to her house in Chappaqua, where Bill Clinton, who did not attend the 9/11 ceremony, was waiting.

Asked about Clinton’s early exit, Republican presidential nominee Donald Trumpsaid he didn’t know anything about it. But Rep. Peter King told The Washington Post that during the ceremony it was Trump who informed him of Clinton’s health issue.

“It was actually Trump who told me what was going on,“ King told a Washington Post reporter. „He leaned over and told me that ‚Hillary wasn’t feeling well.‘ I said, ‚Really?'“

Clinton was in New York for Sunday’s ceremony commemorating 15 years since the 9/11 terror attacks.

Clinton and Trump earlier greeted supporters as they entered the downtown Manhattan 9/11 memorial. Both had promised to suspend campaign activities to mark the 15th anniversary of the attacks.

Fox News’ Rick Leventhal and The Associated Press contributed to this report.