HONG KONG, Oct. 13 (Xinhua) -- The High Court of China's Hong Kong Special Administrative Region (SAR) on Friday ruled that 20 participants of the illegal "Occupy Central" movement in 2014 were guilty of contempt of court.

The quantum of sentence will be announced another time.

The Court of First Instance of the High Court made the verdict after months of trial for the lawsuit brought by the Hong Kong SAR government.

After the illegal "Occupy Central" movement started in September 2014, some taxi and mini-bus associations applied for and received a court injunction which banned the protesters from occupying some Mong Kok streets in Hong Kong's Kowloon district.

Law enforcement personnel with the court and the police forces later started a clearance operation in November 2014 in accordance with the injunction, but their operation was hindered by those 20 accused including Joshua Wong and Lester Shum, two student participants.

Judge Andrew Chan said the High Court takes the view that their presence at the area made the job of the bailiffs and the police officers in clearing and removing obstacles along the area substantially more difficult.

Their presence and conducts were, not only inherently likely, but factually calculated, to delay if not to frustrate the execution of the Amended Injunction Order, Chan said.

The court has no doubt that the respondents' actions amounted to a serious interference with the administration of justice, Chan said.

Wong, Shum and other nine accused have already pleaded guilty to the charge while the other nine refused to plead guilty.