The Norfolk County OPP are investigating to separate fires.
On Friday, firefighters were called out to Windham Road 12 to respond to a large field fire.
Three acres of rye was completely destroyed but fire crews prevented it from spreading further.
Police are treating this fire as suspicious.
Meanwhile, a porta potty set on fire in Delhi.
The incident happened Sunday evening at Centennial Park Trail but the portable washroom was completely destroyed.
Anyone with information is being asked to contact the police.