LOS ANGELES - THE Federal Bureau of Investigation said on Wednesday it has arrested a 66-year-old US national suspected of mailing more than 120 packages marked 'anthrax' containing seemingly non-toxic white powder to media outlets.

The suspect, Marc Keyser, is a resident of Sacramento, California's capital and has been charged with sending the packages to media outlets in that city, 150 kilomtres west of San Francisco, and to others in the states of Washington and North Carolina, an FBI spokesman told AFP by telephone.