From Reuters:
Several staff at a Chinese television station were suspended from their jobs after footage of the 1989 Tiananmen Square protests slipped past censors and was broadcast to the public, a human rights group said on Friday.
Chinese media outlets are barred from mentioning the crackdown around Beijing’s Tiananmen Square that killed hundreds of pro-democracy demonstrators. But a cable television operator in the southern Chinese city of Guangzhou allowed around 10 seconds of sensitive footage from a Hong Kong broadcaster to slip into a Chinese public broadcast on the evening of June 5.
A local journalist who watched the broadcast said the image of a lone man blocking a line of tanks just off Tiananmen Square in 1989 was shown, as well as footage of 150,000 people at a candlelight vigil in Hong Kong on the evening of June 4 this year to mark the 20th anniversary of the crackdown.