Tiananmen Square activist refused entry to Hong Kong to attend June 4 museum opening
One activist was denied entry a fourth time as he tried to visit the June 4 museum
Hong Kong's Immigration Department has been accused of operating a blacklist of mainland dissidents after a US-based activist was barred from entering the city for the fourth time.
Dr Yang Jianli had planned to attend the opening of the world's first permanent museum dedicated to the June 4, 1989 crackdown on student protests in Beijing's Tiananmen Square.
But after arriving at Chek Lap Kok airport from Taiwan on Saturday night, Yang said he went through three hours of interrogation by immigration officials before being placed on a flight back.
Watch: World's first June 4 museum to open in Hong Kong
"It proves that there is a blacklist in Hong Kong which tries to block" dissidents, Yang said of his case. "The list is not decided by Hong Kong's government but Beijing, which attempts to intervene in the city's internal affairs."
The Immigration Department said it would not comment on individual cases.