We believe that even if at the highest levels there was not detailed operational knowledge, there has to be accountability with respect to anybody in the Iranian government engaging in this kind of activity.

WHITEHOUSE: President Obama and President Lee Press Availability

"We believe that even if at the highest levels there was not detailed operational knowledge, there has to be accountability with respect to anybody in the Iranian government engaging in this kind of activity, " the president said.

BBC: Obama censures Iran over 'plot'