MURPHY, Ore. — Rural Metro Fire is investigating a suspicious fire that burned two vehicles, a structure, and spread to nearby brush.

The fire broke out in the 3500 block of Southside Road.

Rural Metro firefighters were able to quickly contain the fire.

They finished mop-up by 3 a.m.

The cause of the fire is still under investigation.

Austin Prince, Rural Metro Division Chief, said investigators spent the day looking for any possible indicators.

"At this point it still remains undetermined, we’ve got a couple of leads that have yet to be proven, there’s some questioning that needs to be done by some local folks that may have some information that’s important to us," Prince said.

Prince said the process of figuring out where the fire started can be a tricky one.

"It’s really hard to determine which was the starting location, was it starting in the wildland and moved to the building or vice versa so you have a lot of things you have to look at and sometimes there’s patterns that you can see within the investigation process," Prince said.