Nearly 90 percent of the immigrants arrested had criminal records, deportation orders or had reentered the United States after being removed. The rest, 146, were people who encountered the agents and could not prove they were in the United States legally. Officers arrested 530 immigrants in their homes and workplaces and took custody of nearly 800 others from jails in Los Angeles, Orange, Ventura, Riverside and San Bernardino counties. The 1,327 arrests surpassed the 1,297 undocumented immigrants arrested by ICE agents at meat processing plants in six states last December, part of an investigation into identity theft. Since the 9/11 terror strikes, pressure has been growing on the federal government to crack down on illegal immigrants, especially those who have committed crimes. ICE has been waging a public relations battle to show it is addressing the problem, conducting a controversial effort across the nation to remove such violators. For the latest news and observations on crime in Los Angeles and the San Fernando Valley, check out the Daily News’ crime blog by clicking here. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! More than 1,300 immigrants, most of whom either have criminal records or have failed to abide by deportation orders, were arrested in Southern California in the past two weeks in a series of federal sweeps. Immigration and Customs Enforcement, which plans to announce the operation at a news conference in Los Angeles later today, called the sweep the largest of its kind in the United States. Nearly 600 of those arrested at homes, workplaces and in jails have already been deported. “Where these laws may not have been enforced in the past, that has changed,” Jim Hayes, Los Angeles field office director for ICE said.