Three relatives of the San Bernardino terrorists who killed 14 people in December at a Southern California social services building were arrested Thursday on federal conspiracy, marriage fraud and false statement charges, the FBI announced.

The arrests don’t appear to bear a direct connection to the terror attack, but center on a 2014 marriage-for-citizenship scam allegedly carried out by Enrique Marquez and Mariya Chernykh.

“While investigating the terrorist attack, federal agents obtained official records showing that Marquez, a former neighbor of Syed Rizwan Farook’s, is married to Chernykh,” the U.S. attorney’s office said in a statement. “The investigation determined that Marquez agreed to marry Chernykh so she could obtain immigration benefits that were not available to her because she is a Russian citizen and did not have legal status in the United States” . . .

Marquez is already in jail and awaiting trial for conspiring with one of the San Bernardino attackers, Syed Rizwan Farook, in terror plots that never materialized.

Federal court documents obtained by FoxNews.com tied to Marquez’s case show both he and Farook abruptly halted plans for a dual terror attack in 2012. In that assault, Marquez and Farook allegedly planned to use pipe bombs and two AR-15 rifles “to maximize the number of casualties” at Riverside City College, a nearby institution they attended, and on state Route 91, a busy freeway with few exits where motorists are frequently stuck in heavy gridlock. (Read more from “Three Relatives of San Bernardino Shooter Arrested” HERE)

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