The last named defendant in the armed occupation of an Oregon wildlife refuge hasn't been arrested, and his family in Montana isn't giving up his location.

Jake Ryan was identified Monday as the 26th person charged in connection with the nearly six-week-long standoff at Malheur National Wildlife Refuge. He and another man are accused of using heavy equipment to dig through a Native American archaeological site.

Occupation supporters are using social media to call on a northwestern Montana sheriff to shield Ryan from arrest and for people to head to the town of Plains to pray with Ryan's family.

Sheriff Tom Rummel said Tuesday that outsiders should stay away while negotiations are underway for a peaceful resolution for Ryan's arrest.

Ryan's mother, Roxsanna Ryan, says she doesn't know where her son is.