The first of several Black Lives Matter protests across Australia on Saturday got underway against a backdrop of possible clashes between demonstrators and police in Sydney, after a court sided with police that the gathering posed too much risk for spreading the coronavirus.

The first gathering in the southern city of Adelaide was held to honor George Floyd and to protest against the deaths of indigenous Australians in custody.

That was the plan in Sydney as well, where thousands of people were expected to rally. But New South Wales state Supreme Court Justice Des Fagan ruled on Friday that the rally was not an authorized public assembly. Fagan said he understood the rally was designed to coincide with similar events in other countries.

“I don’t diminish the importance of the issues and no one would deny them in normal circumstances,” he said. “No one denies them that but we’re talking about a situation of a health crisis.”

Floyd, a black man, died in handcuffs while a Minneapolis police officer pressed a knee on his neck even after he pleaded for air and stopped moving. In Sydney, outdoor gatherings are restricted to 10 people, while up to 50 people can go to funerals, places of worship, restaurants, pubs and cafes.