A specialist hazmat crew is at a freight yard in West Melbourne investigating a chemical leak.

Authorities were called when a leak was noticed after a container was moved in the early hours of Tuesday morning. The container has been placed within bunds and an exclusion zone has been set up.

Firefighters wearing breathing apparatus and splash suits will open the container and take photos of the leaking product so it can be identified. The MFS says the situation is not controlled at the moment.