BURNS, Ore. – Officials closed in on the armed occupation at a wildlife refuge near Burns as the number of anti-government protesters dwindled, but authorities stressed the situation was not resolved.

Oregon State Police removed a roadblock on Highway 205 leading to the Malheur National Wildlife Refuge on Thursday afternoon. Media members including KGW's Pat Dooris headed toward the refuge but were stopped at a checkpoint.

Just before 4 p.m., Dooris counted 17 vehicles headed towards the refuge. Two were large armored vehicles, he said.

Police said the refuge remained closed.

"The situation has not been resolved," the Harney County Sheriff said. "Refuge remains closed and the containment was simply moved for the convenience of local residents."

The FBI announced that one more person left the refuge through a checkpoint on Thursday and they believed four remained.

"Again, we still believe there are occupiers on the refuge," said FBI Special Agent Greg Bretzing. "The negotiators continue to work around the clock to talk to those four people in an effort to get them to come out peacefully."

The protest leader, Ammon Bundy, was arrested Tuesday night and the group's spokesman, LaVoy Finicum, was killed. In all, 11 protesters have been arrested.

Related:

Four left at refuge; one with federal warrant

Bundy to remaining protesters: 'Go home'

Armed protesters continue occupation after Bundy arrest

Follow us on Facebook for the latest breaking news updates

Watch live or check weather & traffic updates on the go with the KGW News app.