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President Donald Trump was taken to Walter Reed Medical Center on Friday "as a precautionary measure" following his coronavirus diagnosis, a senior administration official told NBC News.

Trump was seen wearing a mask as he departed the White House and walked toward his helicopter, Marine One. He waved to the press but did not stop for questions.

"Out of an abundance of caution, and at the recommendation of his physician and medical experts, the President will be working from the presidential offices at Walter Reed for the next few days," the White House press secretary said.

The president's transfer to the medical facility comes less than a day after he announced his diagnosis. First lady Melania Trump also tested positive for Covid-19.

President Donald Trump was taken to Walter Reed Medical Center on Friday "out of an abundance of caution" following his coronavirus diagnosis, the White House said. 

Trump was seen wearing a mask as he departed the White House shortly after 6:15 p.m. ET and walked toward his helicopter, Marine One. He waved to the press but did not stop for questions.

The move, which appears to mark an escalation in the efforts to treat the president, is being made "as a precautionary measure," a senior administration official told NBC News.