Two Georgia men accused of plotting terror attacks on government employees and civilians have pleaded guilty to conspiracy charges in federal court.

The men were arrested after months of surveillance by an undercover informant.

The suspected ringleader of the group, 73 year old Frederick Thomas and 67 year old Dan Roberts entered guilty pleas during Tuesday’s hearing in federal court in Gainesville.

They are among four men arrested in a November sting after seven months of surveillance. An undercover informant infiltrated the fringe militia group, recording hours of conversations which US Attorney Sally Yates says are the linchpin to the government’s case:

“There were a number of times that they talked specifically about what they wanted to do, who they wanted to kill, what buildings they wanted to blow up—they were looking at both the ATF and FBI buildings in Atlanta, as well as the IRS building.”

The men purchased what they believed were explosives and a silencer to use in those attacks. They could face up to five years in prison and a 250 thousand dollar fine.

Tags: federal court, parker wallace, terror plot, Frederick Thomas, Dan Roberts