CNN 's Greg Morrison and Lindy Hall contributed to this report . FBI Director Martinez is headed to California , Long Beach . The federal building has reopened to the public . FBI official says it looks like an isolated incident . `` The situation began ... as an incidence of workplace violence , '' ICE official says .
FBI Director Martinez is headed to California , Long Beach . The federal building has reopened to the public . FBI official says it looks like an isolated incident . `` The situation began ... as an incidence of workplace violence , '' ICE official says .