Police are investigating a suspicious grass fire in Epping on Monday.
Emergency services were called to the fire on Genesis Drive just after 9pm on January 15.
Investigators have been told a man was seen walking his dog before walking to the middle of a vacant block and setting the long grass on fire.
He then left the scene on foot, heading south towards Revelation Road.
Police have released CCTV of a man they believe can assist with their inquiries.
The man is perceived to be Caucasian, about 180 centimetres tall with a medium build, wearing dark coloured shorts, a black and white t-shirt.
He was walking a small dark-coloured dog with white markings on its chest.
Police are also investigating a previous fire at the same location about 7pm on January 11.
Anyone with information can Crime Stoppers on 1800 333 000 or at www.crimestoppersvic.com.au.
