CNN Wire Staff
[cnn-photo-caption image=http://i.cdn.turner.com/cnn/2010/US/06/22/mexico.arizona.lawsuit/story.arizona.cnn.jpg caption="Opponents of Arizona's controversial immigration law rally in New York in May." width=300 height=169]
Mexico on Tuesday filed a brief in federal court in Arizona supporting a lawsuit challenging the constitutionality of a tough new immigration law, Mexico's foreign ministry said.
The lawsuit seeks to overturn SB 1070, a recently passed law due to go into effect late next month, which stipulates that police can ask the residency status of people being investigated for a crime.
"The government of Mexico has requested the court that SB 1070 be declared unconstitutional and that it does not enter into force," the foreign ministry said in a written statement.
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