Enrique Marquez, 24, was arrested on Friday and charged with providing material support to terrorists for supplying Syed Rizwan Farook, 28, and his wife, Tashfeen Malik, 29, with the weapons for their Dec 2 attack on a holiday party attended by Farook's co-workers.

Their assault, which came a few weeks after Islamic State gunmen and suicide bombers killed 130 people in a series ofcoordinated attacks around Paris, has raised anxieties about violence throughout the United States and refocused the race for the White House on national security issues.

Marquez, who has not yet entered a plea, could be sentenced to up to 35 years in prison if convicted of all charges, which also include defrauding US immigration authorities by entering into a sham marriage with a Russian woman in Farook's extended family so she could live in the United States.

Hours after the massacre, a distressed Marquez called 911 to say he wanted to kill himself and that Farook had used a weapon bought by Marquez, according to an Federal Bureau of Investigation affidavit. He then checked himself into a mental health facility.

According to the affidavit, Farook and Marquez met in 2005 when Marquez became Farook's neighbor in Riverside. Farook introduced Marquez to radical Islamist ideology and by 2011 the two men were planning gun and bomb attacks, according to prosecutors and the FBI affidavit.

Farook and Malik were killed in a shootout with police two hours after their rampage in San Bernardino, about 60 miles (100 km) east of Los Angeles.

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