A crane has caught fire and collapsed at a construction site on St Kilda Road near the corner of Moubray Street in Melbourne.

At least 13 fire trucks from the Metropolitan Fire Brigade (MFB) were called in to fight the blaze, understood to have been sparked by an electrical fire in a motor at the base of the crane.

The fire had spread, causing the arm of the crane to collapse and fall to the ground below.

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It crashed on to the street damaging several cars.

There may be more damage on the construction site as well but fire crews have not been able to get to the area.

Firefighters went up in the bucket of a nearby smaller crane to make sure the fire was out and are working on a plan to safely dismantle the crane without causing any further damage.

Fire investigators are looking into the cause of the blaze.

An MFB spokeswoman said there were no injuries.

Photos of the blaze were shared on social media, as was footage of the moment the crane collapsed.

Fire crew hosing down the fire now pic.twitter.com/FJ7pFDwEQh

— Asher Wolf (@Asher_Wolf) February 23, 2016