Car firebombed in Keilor in Melbourne's north-west as teenager remains critical

In short:

A car has been set alight in the driveway of a home in Keilor early this morning.

It is the second firebombing in a residential street in Melbourne's north-west in less than 24 hours.

A teenage boy continues to fight for life in hospital after an arson attack in the nearby suburb of Taylors Hill yesterday morning.