From the article:

Scuffles broke out in the South Korean city of Daegu on Saturday as local officials led by the mayor clashed with police during a protest against an LGBTQ festival.

Opponents including Christian organizations had applied for a provisional injunction against the Daegu Queer Culture Festival, which had received police permission to take place.
They were backed by Mayor Hong Joon-pyo, who claimed earlier this month that the event could “instill the wrong sexual culture in teenagers.”

The injunction was rejected by the court, and the parade – an annual event first held in 2009 – was allowed to continue, prompting Hong and other critics to argue instead that it posed too much of a traffic disruption. Police had warned last week that the area would see heavy congestion due to the parade, and that it would deploy personnel to help manage the traffic.

Tensions came to a head on Saturday when local government officials gathered to protest at the festival site. A video posted by the event organizers shows festival vehicles stuck on the road, unable to enter due to the protesters.