Argentina moved closer to defending its Under-20 World Cup title when it beat Chile, 3-0, in their semifinal on Thursday in Toronto. Chilean players fought with police and security officers after the game. One member of the Chilean delegation was subdued by taser during the brawl.

Argentina, which meets the Czech Republic in the final, opened the scoring in the 12th minute with a fierce left-foot drive from Angel Di Maria, the first goal Chile conceded in the tournament.

Maximiliano Moralez set up the second goal by Claudio Yacob in the 65th minute and scored the final goal himself in stoppage time.

Chile had two players sent off -- Gary Medel and Dagoberto Currimilla -- and the game ended with angry protests by Chilean players, officials and fans aimed at German referee Jan-Hendrik Salver.

The Canadian Press photographer Nathan Denette told Reuters she witnessed the brawl outside the stadium.

"All of a sudden we looked over and there was a big brawl that breaks out, between four or five people," Denette said. "Next thing you know, the bus just unloads and there's eight, 10 players come off the bus and there's just fists flying everywhere, between the cops, the security guards, a couple of ladies were involved that were security.

"It looked like a big dogfight. People throwing fists and cops with their billy clubs out and then all of a sudden it got out of control and a police officer grabbed his taser gun and tasered someone -- I don't know if he was a player or if he was part of the team -- as soon as that happened, it got even worse."

Several bloodied Chilean players were handcuffed and taken by police. The team's damaged bus was towed away.