Democracy activist Joshua Wong and former pro-democracy lawmaker Eddie Chu told journalists at the protest that they had evidence that the government had sent a fixed-wing aircraft to track the speedboat carrying the 12 activists, who have been held incommunicado in Yantian Detention Center in the southern Chinese city of Shenzhen since their detention on Aug. 23.
"Internal flight records of the Government Flying Service provided to us by our sources clearly show that there was a ... police operation, with the fixed-wing aircraft flying a mission from 4.10 a.m. to 8.45 a.m. [on Aug. 23] that was piloted by the police," Wong said at the protest. "This gives the lie to the police claim that they had no prior knowledge of the incident."