subsequent investigations after intelligence information revealed possible terrorist plot . TSA involved although possible are not necessarily related to aviation . No arrests have been made and it is unclear whether this is a new threat . In addition to Los Angles , some other major cities have increased security .
FBI investigating after intelligence information indicated possible terror plot . TSA involved although possible threat not necessarily related to aviation . No arrests have been made and it is unclear whether this is a new threat . In addition to Los Angles , some other US cities have increased security .