A helicopter carrying Iran's President Ebrahim Raisi has crashed, Two crime scenes established following the stabbing of a police officer in Sydney, Manchester City wins a record fourth-straight Premier League title.

Rescuers are on their way to where a helicopter carrying Iranian president Ebrahim Raisi and Foreign Minister Hossein Amir-Abdollahian had a "hard landing".

The new Novavax XBB.1.15 vaccine appears to have been knocked back for approval by the Therapeutic Goods Administration.

Victoria Police estimated 7,000 people attended two different rallies in Melbourne's CBD, initially separated by officers who set up a barrier.

South Australian Premier Peter Malinauskas recently took steps to examine pathways for his government to impose a social media ban on Australians under 14.

The Australian government says the defence force is ready to evacuate hundreds of citizens from New Caledonia, but is waiting for the go-ahead from French authorities, based on safety. Six people have died in the worst violence in the French territory in decades.