A supporter of President Trump attacked a BBC camera operator during a presidential rally in El Paso on Monday night, the broadcaster said.

“BBC cameraman Ron Skeans was violently pushed and shoved by a member of the crowd while covering a President Trump rally in Texas last night,” a BBC spokesman said in an email on Tuesday.

Mr. Trump was in El Paso to increase support for his proposed wall on the United States border with Mexico, in his most significant rally since his funding demands for the project temporarily shut down the government. The president was talking about a decline in attacks on African, Hispanic, and Asian-Americans when the cameraman was pushed.

A 36-second clip from Mr. Skeans’s camera before, during and after the shove was widely circulated on social media on Tuesday. It shows a protester in a red Make America Great Again cap, who has not been publicly identified, shouting at members of the media as he is restrained by someone who appears to be part of the event’s security team.

As the man struggles, the crowd’s chant shifts from “U.S.A.” to “Let him go.”

Gary O’Donoghue, the BBC Washington correspondent who covered the El Paso rally on Monday, said the supporter had “tried to smash” the camera before security escorted him out of the venue.

The BBC condemned the attack. “It is clearly unacceptable for any of our staff to be attacked for doing their job,” the statement on Tuesday said. The president could see what was happening and checked “that all was O.K.,” the statement added.

The White House Correspondents’ Association also condemned the crowd member’s actions, saying in a statement that “the president of the United States should make absolutely clear to his supporters that violence against reporters is unacceptable.”

On Tuesday afternoon, Sarah Huckabee Sanders, the White House press secretary, released a statement that said President Trump “condemns all acts of violence against any individual or group of people — including members of the press.”

She added, “We ask that anyone attending an event do so in a peaceful and respectful manner.”

Since the beginning of his presidency, Mr. Trump has had a strained relationship with the news media. He has repeatedly called journalists “the enemy of the people,” and he used the term “Fake News” on Twitter at least 174 times last year alone.