A judge has ruled that police in Arizona can immediately start enforcing the most contentious section of the state's immigration law.
The ruling on Tuesday by U.S. District Judge Susan Bolton marks the first time police can carry out the 2010 law's requirement that officers, while enforcing other laws, question the immigration status of those they suspect are in the country illegally.
The requirement known by the law's critics as the "show me your papers" provision has been at the center of a two-year legal battle that culminated in a U.S. Supreme Court decision that upheld the requirement.
Opponents then asked Bolton to block the requirement and argued it would lead to racial profiling of Latinos.
Less controversial sections of the law have been in effect since late July 2010.
Stay with cbs5az.com and CBS 5 News for updates on this developing story.
Copyright 2012 Associated Press. All rights reserved. CBS 5 (Meredith Corporation) contributed to this report.