Police are investigating three other fires they also suspect were deliberately lit in the region since Friday night. 

At 11pm the alarm was raised after flames tore along the Murrumbidgee bank near the Wagga CBD.

Watch a video of the fire above. 

 It took two tankers more than an hour to extinguish the fires and they returned on Sunday morning to drench smouldering trees. 

There are three distinct fire areas which indicate someone walked along the trail next to the river and lit the fires as they went. 

The first two burned an area roughly 40 square-metres near the Anglican Church while a short way along another large burn area took hold near the Wagga Beach Caravan Park. 

"It is madness, it's stupidity," said Father Michael Armstrong, who lives in the rectory only metres from where the fire started. 

Father Armstrong noticed the flames when he went to bed and rushed outside with a hose to try to prevent the fire reaching his home. 

"The flames were four or five metres high and at that point it looked like three fires," said Angela Armstrong, who was also in the rectory. 

"It was quite scary; I was shaking so badly I could barely dial Triple-O. 

"It's disgusting ... I don't think they even think." 

Mrs Armstrong rang caravan park manager Trevor Mullard who prepared some visitors for evacuation. 

"We had people ready to get out but thank goodness it didn't come to that," Mr Mullard said. 

"The owner of the park had cleared the bank as part of their fire plan which was very good." 

Wagga police said detectives are investigating the cause of the fire.

 Temora Rural Fire Service member Steve Holden said crews also attended fires at Burley Griffin Way, Ardlethan and Harden at the weekend which are all being treated as suspicious.

"We believe it's suspicious and police are involved, and we are involved," he said.