The new arrests, both in a nearby county, bring the total to six.

The Okaloosa County Sheriff's Office confirmed the arrests but declined to identify the latest suspects or release other details.

A spokeswoman said that information would be announced later Tuesday by authorities from Escambia County, where Byrd and Melanie Billings were killed. They were shot to death at their home near Pensacola last week by several intruders caught on surveillance cameras.

The couple had 17 children — four biological and 13 adopted. Nine children were at the home when the Billingses were killed.