Democratic nominee Hillary Clinton canceled a trip to the West Coast where she was going to hold campaign events Monday and Tuesday following a health scare this weekend at a Sept. 11 ceremony, according to multiple reports Sunday evening.

Clinton, 68, was scheduled to fly out to California Monday, and appear at fundraisers and deliver a speech on the economy on Monday and Tuesday. She was also planning to appear on "The Ellen Degeneres Show."

WHITE PLAINS, N.Y. (AP) _ Hillary Clinton cancels plans to travel to West Coast Monday, Tuesday following health episode at 9/11 memorial. — AP Politics (@AP_Politics) September 12, 2016



It was reported that Clinton on Wednesday was slated to go to a rally in Las Vegas, but the event listing no longer appears on her website.

After appearing at a Sept. 11 ceremony in New York City on Sunday, a video posted to social media appeared to show Clinton collapsing as she was entering a van.

Hillary Clinton 9/11 NYC pic.twitter.com/q9YnsjTxss— Zdenek Gazda (@zgazda66) September 11, 2016



Initially, campaign spokesman Nick Merrill said in a statement that Clinton had felt "overheated" at the event as she departed to go to her daughter's apartment, adding that she was "feeling much better."

Hours later Clinton's doctor issued a statement revealing the candidate had been diagnosed with pneumonia on Friday.

"Secretary Clinton has been experiencing a cough related to allergies. On Friday, during follow up evaluation of her prolonged cough, she was diagnosed with pneumonia," wrote Dr. Lisa Bardack.

Bardack said that Clinton had been put on antibiotics and was "advised to rest and modify her schedule."

"While at this morning's event, she became overheated and dehydrated. I have just examined her and she is now re-hydrated and recovering nicely," Bardack concluded.

Clinton's health has been scrutinized ever since she suffered a concussion in 2012, but recent episodes have furthered fueled speculation, including a bad coughing fit Monday in Cleveland that she attributed to being allergic to 2016 election rival Donald Trump. Trump's campaign and some in the media have brought up her health as a campaign issue.