POLICE investigations are being conducted into suspicious grass fires near Dyson Drive in Ballarat's west with three reported in just over a week.
Police are calling for witnesses who may have seen people acting suspiciously in the area over the past week and believe the fires may have been deliberately lit.
While three fires have been reported to police it is believed there may have been more throughout the week.
Authorities attended a fire near the corner of Dyson Drive and Carngham Road about 5.30pm on Saturday after battling a grass fire near the same location last Wednesday night and also in the previous week.
The fire was on a property leased by Rodney McKinnon, who was stopped by the CFA while trying to return to the area.
"They've stopped me where they've blocked the road," he said.
Mr McKinnon said he believed the fire on Wednesday may have been deliberately lit but had no idea why someone would want to do so.
"Who knows, who knows," he said.
While temperatures are expected to stay low this week, Ballarat Fire Brigade senior station officer Shane Phillips said it was important residents stayed vigilant.
"We have had very minimal rain and have had months of dry weather," he said.
"Such a small amount of rain won't make much difference to how dry the fuels are.
"Mr Phillips urged residents not to let their guard down because of the cooler weather, saying it was still a dangerous fire period.
Anyone who has seen anyone or any vehicles acting suspiciously in the Lucas area is urged to contact the Ballarat Police Criminal Investigation Unit on 5336 6080 or Crime Stoppers on 1800 333 000.