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A five-week crackdown on multinational gang members captured 22 people in Utah out of 1,133 arrests made around the country.

U.S. Immigration and Customs (ICE) announced on Monday the results of its "Project Shadowfire," which was led by its Homeland Security Investigations (HSI).

ICE said the operation included 12 arrests in Salt Lake City, three in Ogden and seven in St. George.

The agency did not release the names of those arrested, but did release other information about them.

Of the 12 people arrested in Salt Lake City, six were U.S. citizens; four were citizens of Honduras; one was from El Salvador and one was from Mexico.

Eight arrests included drug charges, three included charges involving illegal firearms, and two involved illegal entry into the country or possession of fraudulent documents.

ICE said all of those arrested were male and between the ages of 19 and 46.

The agency said the three people arrested in Ogden were all Mexican nationals illegally present in the United States. All were charged with drug and firearms violations, and two were also charged with aggravated felony reentry into the country.

In St. George, six men and one woman were arrested. Six were charged with drug violations, and one was charged with obstruction. Four were U.S. citizens, two were from Mexico and one was from Guatemala.

The five-week operation targeted "violent gang members and their associates, to eradicate the violence they inflict upon our communities and to stop the cash flow to transnational organized crime groups operating overseas," ICE Director Sarah R. Saldaña said in a written statement.

Project Shadowfire was a surge operation between Feb. 15 and March 21. HSI agents worked with numerous local and federal agencies to make the arrests.

ICE said most people arrested were U.S. citizens, but 239 foreign nationals from 13 countries in Central America, Asia, Europe and the Caribbean were also captured.

Of the 1,133 arrests, 915 were listed as gang members and associates, 1,001 were charged with criminal offenses and 132 were arrested administratively for immigration violations.

ICE said the majority of those arrested were affiliated with gangs including MS-13, Sureños, Norteños, Bloods and several prison-based gangs.

HSI agents seized 150 firearms, more than 20 kilograms of narcotics and more than $70,000 in U.S. currency.

It was part of "Operation Community Shield," started by ICE in 2005, which has arrested more than 40,000 people since then.

ldavidson@sltrib.com @LeeHDavidson