Federal prosecutors on Thursday brought terrorism and other serious charges against five people arrested last year on a New Mexico compound, alleging in a new indictment that the group was gathering weapons and training in their squalid quarters to kill FBI and military personnel.

The superseding indictment significantly upgrades the charges against the five, who were arrested last year after they were discovered living with 11 children on the compound. Prosecutors say members of the group conspired to provide material support to terrorists, conspired to murder an officer of the United States and kidnapped a child who later died.

Read more: Washington Post