But he told students that problems in their own lives should not stop them from learning.

VOA: special.2009.09.10

He said the students "were told enough to get you into trouble but not enough to let you make an informed decision about the risks".

BBC: Panorama row: Six students on N Korea trip criticise LSE

Several students told Khan that they respect Malala but were concerned about their safety, he said.

CNN: January 3, 2013 -- Updated 1553 GMT (2353 HKT)