Authorities said two adults who allegedly kidnapped their children from a foster home were in police custody, FOX News confirmed Wednesday.

James Lee Canter, Alisha Chambers and their children were found by police in Grayson County, Va. Canter and Chambers were expected to go before a Grayson County judge for extradition. The two children, James Paul Chambers, 2, and his sister, Breanna, 11 months, were headed back to Watauga County, N.C.

An Amber Alert (search) was issued Saturday for the children after authorities said Canter, 28, a fugitive on a drug charge, brandished a gun when he and their mother, Chambers, 18, took the children from a foster home in the Valle Crucis area early Saturday.

The couple were spotted that same day just over the state line in Johnson County, Tenn., but Tennessee authorities found only their car, containing a rifle and a handgun, Watauga County Sheriff Mark Shook said.

The FBI was assisting because the couple crossed state lines, Shook said Tuesday.

The county social services agency took custody of the children after a raid last March on the couple's remote home, where authorities said they discovered a methamphetamine (search) lab.

Canter has been a fugitive since the raid. Chambers was arrested at the house and charged with manufacturing meth and maintaining a dwelling for its manufacture. She posted bail about two months later.

The Associated Press contributed to this report.