WASHINGTON (CNN) -- The federal government Monday charged six alleged "Islamic radicals" with plotting to kill U.S. soldiers at Fort Dix in New Jersey.
The six were arrested Monday night, the U.S. attorney's office in New Jersey said in a written statement, and are expected to appear in U.S. District Court in Camden on Tuesday afternoon.
"Their alleged intention was to conduct an armed assault on the army base and to kill as many soldiers as possible," the office said.
Officials scheduled a news conference at 2:30 p.m. ET to discuss the case.
The White House said there is no suspected link to any international terrorist group.
A complaint filed in the case says one of the six used to deliver pizza to Fort Dix and knew it "like the palm of his hand."
One of the suspects was born in Jordan, another in Turkey, the attorney's office said. The rest are believed to be from the former Yugoslavia, "either U.S. citizens or living illegally in the United States."
An FBI official said three of the six are in the U.S. illegally.
A criminal complaint filed in federal court in New Jersey said a paid informant who infiltrated the group "consensually recorded" meetings.
An FBI official said six complaints are being filed.
One complaint names as the defendant Dritan Duka, and says he conspired with four others: Mohamad Ibrahim Shnewer, Eljvir Duka, Shain Duka and Serdar Tatar.
The sixth individual, named in an FBI affidavit accompanying that complaint, is Agron Abdullahu.
A complaint naming him as the defendant charges him with aiding and abetting the three Dukas, "who were then aliens illegally and unlawfully in the United States, to possess in and affecting commerce firearms."
The defendants did not immediately release statements or respond to the charges.
The complaint says the group "conducted firearms training in Gouldsboro, Pennsylvania." It also says Shnewer conducted surveillance at several U.S. military sites: Fort Dix and Fort Monmouth in New Jersey, Dover Air Force Base in Delaware, and the U.S. Coast Guard building in Philadelphia.
"On or about November 28, 2006," Tatar acquired a map of Fort Dix, the complaint says.
The complaint alleges that Dritan Duka ordered four AK-47 Kalashnikov fully-automatic machine guns as well as M-16 firearms and handguns, and that Shnewer ordered an AK-47 Kalashnikov as well.
The complaint also mentions a second paid informant.
A law enforcement source told CNN the group played paintball and test-fired weapons as part of their training.
One of the sources said there is a video and an audiotape of the planning.
New Jersey State troopers and the FBI were involved in investigating and arresting the suspects.
White House spokesman Tony Snow said the six "are not being charged with being members of an international terrorism organization. At least at this point there is no evidence they received direction from international foreign terrorist organizations. However their involvement in weapons training, operational surveillance, and discussions about killing American military personnel warranted a strong law enforcement response."
While authorities are glad to have arrested them, the individuals are "hardly hard core terrorists," one law enforcement source said.
Another source said that while the allegations are "troubling," they are "not the type that made the hair on the back of your neck stand up."
Fort Dix is used to train members of the Army Reserve and National Guard for missions in Iraq, Afghanistan and around the world.
It was used in 1999 to house ethnic Albanian refugees from Kosovo, according to the Defense Department Web site.
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