Fire crews and officers were called to a factory yard on Wincolmlee around 4am on 24 June 2018.
It’s thought two separate fires were started which burned out a number of vehicles.
No one was hurt in the blaze but we want to speak with two men who were acting suspiciously in the area at the time.
The only description police have is that they were both wearing light coloured tops. One could have been wearing a black baseball cap.
Police are appealing for anyone who may have seen the pair at that time in the morning to come forward.
Do you have any information? Call 101 quoting reference 16/67919/18.