Ninety percent of illegal guns used in crimes in New York City come from other states, according to statistics released Wednesday by Mayor Michael Bloomberg and Police Commissioner Ray Kelly.

The report, based on data from the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives, found that the number of out-of-state guns used in crimes rose from 1,994 in 2010 to 2,186 in 2011, a 9.6 percent increase.

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Bloomberg, who is the co-chairman of the nationwide group Mayors Against Illegal Guns, called the statistics troubling and reissued his call for stricter national gun safety legislation.

"The reality is laws in states across the nation and in Washington, D.C., have a real impact on the safety of New Yorkers," he said in a statement.

Virginia led the list of states that contributed to the growing number, with 322 guns recovered by the NYPD originating from that state in 2011. The mayor noted that Virginia does not require background checks at gun shows.

North Carolina was the source for 255 guns coming into the city, South Carolina, 251, Pennsylvania, 237, and Georgia, 227, according to 2011 statistics.

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"There's no shortage of weapons flowing north from the south through the iron pipeline," Kelly said in a statement.