MISSOULA, Mont. -

Missoula police are asking people to be extra cautious on the Kim Williams Trail after a transient reportedly attacked a female runner there Saturday evening.

Sgt. James Caton says the incident occurred around 6 p.m. near the 2 mile marker of the Kim Williams Trail on the south side of the Clark Fork River.

The woman told police she was running east on the trail when a man appeared and grabbed her from behind. She was able to fight him away and escape by continuing to run east.

Caton says she was uninjured.

The suspect is described as a transient between the ages of 25 and 35-years-old, barefoot, with a red, orange, or pink cast on his arm.

Caton says the police department has seen an increase in transient activity on the Kim Williams Trail in the last few weeks.

Anyone with information about the incident is asked to call Missoula Crimestoppers at 721-4444.