The Obama administration will seek to reinstate the assault weapons ban that expired in 2004 during the Bush administration, Attorney General Eric Holder said today.

"As President Obama indicated during the campaign, there are just a few gun-related changes that we would like to make, and among them would be to reinstitute the ban on the sale of assault weapons," Holder told reporters.

Holder said that putting the ban back in place would not only be a positive move by the United States, it would help cut down on the flow of guns going across the border into Mexico, which is struggling with heavy violence among drug cartels along the border.

"I think that will have a positive impact in Mexico, at a minimum." Holder said at a news conference on the arrest of more than 700 people in a drug enforcement crackdown on Mexican drug cartels operating in the U.S.

"Some recent Mexican army and police confrontations with drug cartels have resembled small-unit combat, with cartels employing automatic weapons and grenades," the warning said. "Large firefights have taken place in many towns and cities across Mexico, but most recently in northern Mexico, including Tijuana, Chihuahua City and Ciudad Juarez."