A SERIES of fires that police believe to have been intentionally lit in the Porepunkah township is concerning for Wangaratta Police Crime Investigation Unit.

In the latest incidents two fires were lit at about 5pm Thursday near the Station Street roundabout and Solly Lane and investigators were assessing the scene on Friday morning.

A similar fire was lit on October 27 at Solly Lane and it was determined by investigators that no accelerants were used to ignite the fire.

Detective Sergeant of Wangaratta CIU Chris Hill said investigators believes the fires were lit by available material.

He said CFA has responded in time to extinguish the fires, however, police would like to speak with any person who can help them with their investigation.

"The issue is concerning for police and we are encouraging anyone in the community to keep a lookout for suspicious behaviour and call 000 or Crime Stoppers on 1800 333 000 if they have any information."