A major Sydney tunnel has been closed after a crane truck rolled over inside.

The M5 tunnel has been shut eastbound with one lane closed westbound close to Sydney Airport.

A “large quantity of hazardous oil” has been spilled, with experts from Fire and Rescue NSW working to contain it.

A crane has rolled inside the M5 tunnel on the citybound lanes. (9News)

Environmental experts are also on the scene.

The crash has also damaged the fire sprinkler system and tunnel wall.

“This crash has taken out the critical fire suppression system in the tunnel,” Superintendent Adam Dewberry from Fire and Rescue NSW said.

As a precaution, firefighters will position two fire trucks at the end of the tunnel in case of a fire, he said.

A major Sydney tunnel has been closed after a crane truck rolled over inside.Major commuter road the M5 tunnel has been shut in both directions close to Sydney Airport.
The crash damaged the tunnel’s wall and sprinkler system. (Nine)

Dewberry said crews are working to get westbound traffic moving.

They’re also grappling with getting the vehicle out.

Citybound commuters heading east face a longer wait.

”It is looking like it will take some time for eastbound,” Dewberry said.

The driver got out after the crash and only suffered minor injuries.

The tunnel has been closed in both directions. (9News)

Motorists can also consider exiting earlier at the King Georges Road off-ramp to detour along the D5.

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