In a “surreal” episode, Sky News reporter Mark Stone and his cameraman were detained by police while reporting from Tiananmen Square today. Stone was able to continue filming and broadcasting live while being transported in a police van and questioned by an officer. Watch the footage here:

Stone suggested that the incident was triggered by an on-air reference to the 1989 Tiananmen protests, but according to a Sky News spokeswoman, police told the pair that they had failed to properly display their press accreditation. They were later allowed to leave:

Interesting day in Beijing. Day time reporting on leadership changes. Evening spent talking to Police. They have released us now.

— Mark Stone (@Stone_SkyNews) March 15, 2013