(CNN) -- Authorities believe two Arizona prison escapees and their alleged accomplice may be in the Yellowstone National Park area of Montana and Wyoming, based on recent information, the U.S. Marshals Service said Sunday. 

John Charles McCluskey, 45, and Tracy Province, 42, are described as armed and dangerous. They have been at large since fleeing an Arizona prison on July 30. A third escaped inmate, Daniel Renwick, 35, was arrested the day after the escape in Rifle, Colorado, where he got in a shootout with police. 

David Gonzales, the U.S. marshal for Arizona, told CNN that the remaining fugitives are now suspected in the killings of a couple whose bodies were found Wednesday in New Mexico. 

"There was evidence that ties them, our suspects, who escaped from prison, directly to their murders," Gonzales told CNN. 

Gonzales said the fugitives have frequented truck stops and campgrounds. He said McCluskey and Province have "white supremacist leanings" and could be looking for "people who are sympathetic to their cause." 

Yellowstone sits at the northwest corner of Wyoming and extends a short distance into Montana and Idaho, both states where white supremacist groups have attempted to take root. Thomas Henman, a spokesman for the Marshals Service, said Arizona prison officials have said the convicts belong to the Aryan Brotherhood prison gang, but there was no concrete information to tie them to white supremacist groups outside prison. 

A team of marshals from Arizona has been working in the Yellowstone area since Sunday morning, along with marshals from Montana and Wyoming and officers from the National Parks Service. He wouldn't divulge the source of the information that has led authorities to Yellowstone, but said it is believed to be very credible. 
When did they escape?
They have been at large since fleeing an Arizona prison on July 30.