Residents Melbourne's west have been warned to shelter inside and keep their doors and windows shut, as a blaze rages through a West Footscray factory, sending toxic smoke into the suburbs.

 

The Metropolitan Fire Brigade (MFB) says the fire began early this morning; more than 80 firefighters were fighting the fire and 30 trucks and cherry picker aerial appliances were on the scene.

 

The MFB issues a Watch and Act message urging everyone within a 500-metre radius to take shelter indoors immediately.