Police say they have arrested a 46-year-old man in connection with the two nuns who were brutally stabbed to death, the Mississippi Department of Public Safety said early Saturday.
"Sanders was developed as a person of interest early on in the investigation," said MBI director Lt. Col. Jimmy Jordan.
Authorities say Rodney Earl Sanders of Kosciusko has been charged with two counts of capital murder in the deaths of Sister Margaret Held and Sister Paula Merrill, both 68.
Their bodies were discovered Thursday after they failed to show up for work at a clinic in Lexington, Mississippi, about 10 miles from where they lived.
Police tracked down Sanders Friday night. They'd issued a reward of $20,000 to help find him.
A wake will be held Sunday and a memorial Mass will be held Monday for the two nuns.
The Associated Press contributed to this report.