(CNN) -- The fierce debate over a new Arizona immigration law spread to America's pastime Sunday as a group of protesters rushed on to the field during the 5th inning of the Washington Nationals-Arizona Diamondbacks game in Washington, D.C.
As security guards tackled one protester, another tried to sprint across. In all, four were eventually escorted away from Nationals Park.
Amateur video posted on YouTube showed a woman being chased by several security guards before they caught up with her.
"She's getting cuffed," a fan is heard saying on the tape.
Then, another protester took to the field running away from security guards towards center field before he too was subdued.
Moments later, two women tried to unfurl a banner in the outfield but were interrupted by another security guard.
As the events unfolded, some of the game attendees booed the protesters and cheered the guards.
The new Arizona law requires police to check whether a person is in the United States legally if there is a reason to suspect he or she isn't.
Critics say the law could foster racial profiling. Many of them have been urging Baseball Commissioner Bud Selig to move the 2011 All-Star Game from Phoenix.
Last month, a federal judge granted a preliminary injunctionthat blocked the most controversial parts of the law -- a day before it was to take effect.
The injunction means that, at least for now, police are prevented from questioning people's immigration status if there is reason to believe they are in the country illegally.
Arizona Gov. Jan Brewer said the state would file an appeal, signaling a legal escalation that some expect will end up before the U.S. Supreme Court.