A heavily armed US Coast Guard boat was seen patrolling the waters near Donald Trump's Mar-A-Lago resort after a supporter of the president claimed to have sneaked into his office to take a selfie.

The boat was pictured guarding the Lake Worth Lagoon, not far from Trump's Palm Beach property on Sunday.

Later on Sunday evening, Trump departed Florida on Air Force One, ending his fifth weekend at Mar-A-Lago since the beginning of his presidency - and his seventh consecutive weekend in a Trump-branded property.

The previous night, supporter Joseph Young shared a selfie on Instagram of taken in president's study at the resort, with a painting of a noticeably younger Trump over his right shoulder.

The alleged agent evader captioned the photo: 'Snuck by secret service to catch this selfie. They might have told us not to go in there.'

A heavily armed US Coast Guard boat was seen patrolling the waters near Trump 's Mar-A-Lago resort Sunday after a supporter claimed to have sneaked into his office to take a selfie

The boat was pictured guarding the Lake Worth Lagoon, not far from Trump's Palm Beach property, where he spent the weekend for the fifth time since the start of his presidency

Joseph Young (pictured) claimed on Saturday night that he was able to sneak passed Secret Service officers at the Mar-a-Lago to take a selfie in Donald Trump's office

Young made his claim on Instagram on Saturday night during a visit to the Palm Beach resort

Later on Sunday evening, Trump departed Florida on Air Force One, ending his seventh consecutive weekend in a Trump-branded property

President Trump posed with the crew before boarding Air Force One at the Palm Beach International Airport Sunday as his family weekend drew to a close

The commander-in-chief was pictured boarding Air Force One on Sunday. First Lady Melania Trump and son Barron, who traveled with him Friday, didn't seem to be in attendance

Some of Young's followers were quick to poke fun at him over the picture.

'You're not smart,' Mandy Rogers-Kravetz wrote.

'Woah this was a stupid idea from your perspective,' another commented.

'Glad security is so tight at the "southern White House,' one more follower said.

However, it appears Young was not the only person to get into the president's study over the weekend, with at least one other Mar-a-Lago guest snapping a shot in the room.

Frank Vigilante posted a picture on social media of himself and his mother standing in front of the same portrait of Trump.

'In Trump's study with Mom,' he captioned the image.

Other social media user posted pictures that appeared to be taken in the same room, and in front of the same portrait of Trump

Others at the resort posed for pictures with other government officials, including this man with Mike Pence

Vice-president Mike Pence also popped up in a snap taken at the resort, with actor Mike Loeb sharing a picture on Saturday night.

'At #maralago with #vicepresident #mikepence,' he wrote late on about 10pm.

The initial post by Young, and his claim that he was able to avoid the Secret Service, could spark the latest controversy regarding security at Trump's so-called 'Winter White House'.

Earlier this year, actor and businessman Richard DeAgazio created headlines by sharing a picture on Facebook of a soldier he claimed was carrying the 'nuclear football'.

Donald Trump is seen arriving in Florida on Friday with Melania and Barron. The resort visit is Trump's fifth in just eight weeks

President Donald Trump arrives on Air Force One at the Palm Beach International Airport, Friday, March 17

'This is Rick...He carries the "football" The nuclear football (also known as the atomic football, the President's emergency satchel, the Presidential Emergency Satchel, the button, the black box, or just the football) is a briefcase, the contents of which are to be used by the President of the United States to authorize a nuclear attack while away from fixed command centers, such as the White House Situation Room,' DeAgazio wrote.

'It functions as a mobile hub in the strategic defense system of the United States. It is held by an aide-de-camp. and Rick is the Man.'

DeAgazio then posted another photo of Rick carrying a large black briefcase that looked identical to the one containing the nuclear codes.

DeAgazio also shared photos of President Trump - who was dining with Japanese Prime Minister Shinzo Abe - when he was informed of the news of the North Korea ballistic missile test.

Guests taking pictures at Mar-a-Lago has created controversy already this year, after Richard DeAgazio claimed to be photographed with a soldier in charge of the 'nuclear football'

DeAgazio posted another photo of 'Rick' (right) allegedly carrying a large black briefcase that looked identical to the one containing the nuclear codes

'HOLY MOLY !!! It was fascinating to watch the flurry of activity at dinner,' he wrote.

'The Prime Minister Abe of Japan huddles with his staff and the President is on the phone with Washington DC. the two world leaders then conferred and then went into another room for hastily arranged press conference. Wow.....the center of the action!!!'

In the wake of the incident, many alleged the president was not in a secure enough environment to be discussing such serious matters.

'There's no excuse for letting an international crisis play out in front of a bunch of country club members like dinner theater,' House Minority leader Nancy Pelosi tweeted at the time.

Chelsea Clinton also weighed in, writing: 'How many of Mar-a-Lago's new members will be (already are?) members of foreign intelligence agencies & media organizations?'

On the same night earlier this year, Trump was pictured with Japanese Prime Minister Shinzo Abe after being alerted to a North Korean missile test

Donald Trump and Japanese Prime Minister Shinzo Abe at Mar-a-Lago on February 11 during a dinner

Many were critical of the president, accusing him of not being in a secure enough environment to be discussing such serious matters

Trump headed to Mar-a-Lago this weekend for his fifth visit since becoming president eight weeks ago.

He also played his 10th round of golf during his presidency on Saturday at his own Trump International Golf Club in West Palm Beach.

During the campaign, Trump repeatedly said he would rarely leave the White House because 'there’s so much work to be done'.

'I would not be a president who took vacations. I would not be a president that takes time off… You don’t have time to take time off,' he said in 2015.

Politico reported each trip taken by Trump to the resort cost upwards of $3million, which would mean he has racked up about $15million with the five trips since taking office.