A volunteer for President Trump’s advance team blocks a photojournalist trying to take a photo of a protester during a rally in Evansville, Ind., on Thursday night. (Evan Vucci/AP)

A volunteer working for President Trump’s reelection campaign obstructed the shot of a photojournalist as he tried to capture the image of a protester being led out of a rally Thursday night in Evansville, Ind.

A photo of the incident, which went viral on social media after the rally, shows the unidentified volunteer stretching the back of his hand over the lens of the photographer’s camera as he attempts to capture the moment. Trump paused his remarks as the protester was escorted out of the at-capacity arena.

The photo of the volunteer’s action was taken by Associated Press photographer Evan Vucci, who in an Instagram post identified the man as working for the advance team of Trump’s campaign.

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Trump was in Evansville to promote the candidacy of Republican Mike Braun, who is challenging Sen. Joe Donnelly (D-Ind.) in one of this fall’s most closely watched Senate races.

Trump’s campaign did not immediately respond to a request for comment on the volunteer’s actions.

In a statement Friday afternoon, White House Correspondents’ Association President Olivier Knox said that he had spoken to the Trump campaign and was assured “that these were the actions of an inexperienced volunteer, who understands that he acted in error.”

Knox said the campaign relayed that the volunteer has been taken him off the road and promised the same thing would not happen again.

On Thursday night, the episode prompted outrage from journalists, who cited Trump’s frequent hostility toward the media, which he has characterized as “fake news” and “the enemy of the people.”

“ENEMY OF THE PEOPLE: Trump staffer physically blocks you from seeing what is really going on. Stunning,” MSNBC’s Kasie Hunt wrote on Twitter.

“This is crossing a line,” USA Today White House reporter Gregory Korte tweeted.

“Caught in the act,” Zeke Miller, a White House reporter for the AP, said on Twitter.

During his remarks, Trump derided “fake news,” a term he said applies to “85 percent” of the media — up from his estimate of 80 percent last week.