When President Donald Trump held a campaign rally in Ohio, a chant appeared again, but this time taking place outside the event venue and with the phrase “lock him up.”

A video on The Cincinnati Enquirer shows a fight that broke out outside U.S. Bank Arena in Cincinnati, where President Trump was addressing a massive crowd inside on  Aug. 1.

In the footage, one young man got out a Ford pickup truck and punched an older man standing on the street.

It was unclear what led to the altercation that took place on the corner of East Pete Rose Way and Broadway, according to The Cincinnati Enquirer.

Scott Fantozzi, who captured the video, saying it appeared the two men were arguing about politics.

Cincinnati police responded within seconds and arrested the man who had thrown punches at the victim.

As the attacker was led away by police, the crowd started chanting: “Lock him up, lock him up.”

Cincinnati police said the attacker is Dallas Frazier, 29, detained for assault.

Lt. Steve Saunders, a police spokesman, said Thursday evening that Frazier was being booked at the Hamilton County Justice Center.

Jail documents say Frazier, of Georgetown, Kentucky, is charged with misdemeanor assault.

The last time when President Trump held a rally, in North Carolina, the crowd chanted another phrase: “Send her back,” after the president criticized Rep. Ilhan Omar of Minnesota, saying she “smeared U.S. service members in ‘Black Hawk Down,’” “she slandered the brave Americans trying to keep peace in Somalia,” and she blamed America for the economic crisis in Venezuela and refused to condemn Al Qaeda.