Trump issues pledge on medical records after Clinton diagnosis

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US Republican presidential candidate Donald Trump has pledged to release details about his health after his Democratic rival Hillary Clinton was diagnosed with pneumonia.

Mr Trump said health had now become "an issue" in the election campaign.

Mrs Clinton was taken ill on Sunday at a 9/11 memorial ceremony and cancelled a campaign trip to California.

She will also be releasing new medical records to help ease concerns about her health, a campaign spokesman said.

"There's no other undisclosed condition. The pneumonia is the extent of it," Brian Fallon told MSNBC.

The incident capped off a difficult weekend for Mrs Clinton, who came under attack from Mr Trump for calling half of his supporters "deplorable" people on Friday. Mr Trump wished her a speedy recovery and said he would release the results of a medical examination he took over the past week, with "very, very specific numbers".

So far Mr Trump has only released a note, in which his doctor declared that he would be "the healthiest individual ever elected to the presidency".

Mr Trump, 70, and Mrs Clinton, 68, are among the oldest US presidential candidates in history.

White House spokesman Josh Earnest said it was "entirely legitimate" for Americans to want to know about the health of their president but that it was up to the candidates to decide what level of detail they were prepared to release.

On Sunday, video showed Mrs Clinton being supported by aides as she entered a van to leave the 9/11 ceremony after an hour and 30 minutes. Her campaign initially said she had been taken to her daughter's New York flat after feeling "overheated".

She re-emerged later on Sunday, telling reporters: "I'm feeling great. It's a beautiful day in New York."