By Justin Blum

March 6 (Bloomberg) -- Seven months ago, Mustafa Salat told his father he was taking his clothes to the laundromat near their apartment in St. Paul, Minnesota. He never returned.

Salat, 19, later called from his birthplace, Somalia, and said he was okay, though he wouldn’t discuss what he was doing in a country he left when he was one year old, according to his parents, Lul and Ali. Salat’s parents, along with U.S. authorities, said they fear he and other young Somali-Americans from the Minneapolis-St. Paul area were recruited to train at terrorist camps and fight in Somalia’s civil war.

Now, the Federal Bureau of Investigation is concerned those Somalis may return to the U.S., where they are citizens, and plot terrorist attacks. Those fears were heightened last week when Robert Mueller, the FBI director, said a Somali-American living in Minneapolis was “radicalizedâ€