In short:

There have been clashes between police and a large group of protesters outside the Melbourne Convention and Exhibition Centre where a major defence and weapons expo is being held.

Hundreds of officers have been called in for what Victoria Police say is their biggest operation since the S11 protests outside the World Economic Forum in Melbourne 24 years ago.

What's next?

Police and protesters are expected to remain on scene in large numbers throughout the conference.

Live updates here: https://www.abc.net.au/news/2024-09-11/live-blog-land-forces-protest-melbourne-israel-gaza/104333922

Capsicum spray, rubber bullets and tear gas have been used on parts of the crowd.