The Latest on an armed group that took over buildings at a federal wildlife refuge in Oregon (all times local):

9:30 a.m.

Newly released documents show the four remaining occupiers at an Oregon wildlife refuge are facing charges.

An indictment unsealed Thursday names a total of 16 defendants, including standoff leader Ammon Bundy and other occupiers who were arrested last week.

A federal grand jury charged all with felony conspiracy, accused of using intimidation to prevent federal officers from doing their work at Malheur National Wildlife Refuge.

The armed holdouts have said they wouldn't leave until receiving assurances they wouldn't be charged.

The indictment says two conspirators traveled to the area in October to warn the local sheriff of "extreme civil unrest" if certain demands weren't met.

The documents say that once the occupation began on Jan. 2, the group brandished firearms to keep officials from carrying out their duties.