A SEAL convoy was spotted waving a large, 'unauthorized' Trump flag, the Navy has confirmed.

Videos of the flag emerged on social media after four military vehicles were seen on a highway outside Louisville, Kentucky, according to a Navy spokesperson Jacqui Maxwell.

Maxwell called the flag 'inappropriate' and military regulations state the sponsorship or endorsement of any 'political candidate, campaign or cause' should be avoided, the Courier Journal reported.

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A Navy SEAL convoy (pictured left and right) was spotted waving a large, 'unauthorized' Trump flag, a Navy spokesperson confirmed

The first of four military vehicles had a large Trump flag attached to the back, and Carole Puryear recorded the convoy as it passed her on the highway.

The response was mixed, with some people celebrating the show of support while expressing love for both the president and the military.

Richard Barris wrote on Twitter: 'A truck of Navy SEALS flying Trump flag is not "news." Nearly all operators--Seals, Green Berets, Force Recon--are Republican & LOVE Trump.'

But others were concerned by the flag. Twitter user @fairnatacat wrote: 'May I have a word with the Navy Seals choosing to fly a Trump flag rather than Stars & Stripes? I believe they work for us, not him.'

Chris Rowzee, a 28-year veteran of the Air Force and the spokesperson for Indivisible Kentucky, an activist organization formed after Trump's election victory said she was 'disturbed' by the incident, the Courier Journal reported.

Chris Rowzee, a 28-year veteran, said the display was 'chilling' and 'disturbing'

She said: 'Our nation's military must remain loyal to the constitution, and not any one individual.

'It's critical to our democracy that the American public be able to trust that their military is apolitical and non partisan.

'This type of blatant partisan political display demonstrating allegiance to a singular person brings to mind the types of actions historically seen in authoritarian regimes and dictatorships. It's chilling.

'I truly hope the Navy conducts a thorough investigation into this incident amd takes appropriate corrective action.'

The response was mixed, with some people celebrating the show of support while expressing love for both the president and the military

The vehicles did not have any identifiable markings, and internet sleuths struggled to determine which unit they belonged to.

Maxwell told ABC: 'The convoy were service members assigned to an East Coast-based Naval Special Warfare unit driving vehicles while transiting between two training locations.'

'Defense Department and Navy regulations prescribe flags and pennants that may be displayed as well as the manner of display. The flag shown in the video was unauthorized,' she added.

An inquiry has been launched into the incident. Maxwell was unclear what the possible penalties would entail.