A group of soldiers appeared to crash Donald Trump's inauguration on Friday in a bizarre moment that unfolded in the background of his first speech as president.

The President had just begun his address when several members of the armed forces in uniform walked up behind him and stood there stoically.

Viewers could have gotten the impression that all was going as planned, if not for the appearance of an extra man in uniform. That man seemed to tell the soldiers something, prompting them to leave before the end of the speech.

Trump didn't seem to notice anything out of the ordinary and carried on with his address.

A group of soldiers appeared behind Donald Trump in a bizarre moment during his inaugural speech on Friday and stayed behind the new president for a short moment

Trump had just begin his inaugural address when the soldiers in uniform showed up behind him. The 45th president of the United States didn't seem to notice anything abnormal

The 45th president of the United States had just thanked Barack and Michelle Obama for their 'gracious aid' during the transition.

Members of the audience, including Hillary Clinton and George W Bush, were seen unwrapping plastic covers to shield themselves from the rain.

'Today's ceremony however has very special meaning because today we are not merely transferring power from one administration to another or from one party to another, but we are transferring power fron W DC and giving it back to you, the people,' Trump said as the soldiers showed up behind him.

They stayed behind the president for about 40 seconds until another member of the forces came up too and said something.

One of the soldiers nodded as the group retreated back and left the area.

It is unclear exactly what happened during the president's speech. Some sources told TMZ that there had clearly been a mishap.

No one however would explain what had unfolded, with one source telling the website: 'No one's saying anything.'