Police have released CCTV vision of arsonists targeting cars and a factory in Melbourne in two incidents believed to be linked to corruption in the construction industry.

Detectives from Taskforce Hawk have shared the footage as part of their investigation into two fires in Maribyrnong and Derrimut earlier this year.

The first fire took place outside a home on Scenic Drive in Maribyrnong, north-west Melbourne, on April 6.

Footage shows two unknown offenders dousing cars in accelerant before setting them alight shortly after 1.30am.

The two cars went up in flames as the offenders fled the scene.

Nobody in the home was injured in the fire and the property was not damaged.

The second fire was at a factory in Derrimut, in Melbourne's west, on May 27.

Emergency services were called

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