SAN FRANCISCO (CBS SF) – A demonstration in support of AT&T Park concession workers at a San Francisco Giants game on Tuesday night led to 10 arrests, police said.

Hundreds of members of Unite Here Local 2 and their supporters gathered outside the ballpark on Tuesday evening before the Giants’ game against the San Diego Padres, then dozens bought tickets to the game and came inside, police said.

READ MORE: Michelle Go, Killed In New York Subway Attack, To Be Mourned At San Francisco Chinatown Vigil

The union, which represents the concession workers, is in a labor dispute with the team’s food and beverage subcontractor Centerplate for better wages, benefits and job security.

About 40 to 50 protesters staged a “sit-down” demonstration near the Gilroy Garlic Fries stand behind Section 119 during the game. When officers notified them that they were violating the ballpark’s fan code of conduct and asked them to leave, 10 refused and were arrested, police said.

The protesters were cited for trespassing and were released after being escorted out of the ballpark, according to police.

The Unite Here Local 2 concession workers, who launched a one-day strike during a game last month, were chanting to fans and encouraging them not to buy food at the concession stands, union spokeswoman Nischit Hegde said.

READ MORE: Feds Announce $50B Plan To Fight Western Wildfires Where Forests Meet Civilization

Hegde said the workers have not received a pay hike in three years despite two lucrative World Series wins by the Giants.

She said the union is asking for “wage increases and dignity,” including benches to sit on during work breaks.

Sam Singer, a spokesman for the subcontractor Centerplate, has said AT&T Park workers, who he said earn between $15 and $20 per hour, are the highest-paid staff in the concession business.

Giants spokeswoman Shana Daum has emphasized that the dispute is not with the team and that the organization is encouraging both sides to get back to the bargaining table to resolve their differences.

Hegde said the union and Centerplate met for negotiations last week but that the company “has pretty much dug in on their proposal.”

She said two more bargaining sessions are scheduled between the two sides next month.

MORE NEWS: Suspect In November Smash-and-Grab Robbery At High-End Sneaker Store In Santa Clara Arrested

(Copyright 2013 by CBS San Francisco and Bay City News Service. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)