Authorities are investigating armed robberies at two Cabarrus County Harris Teeters in the past month, according to a news release from investigators. The first robbery happened at the Poplar Tent Road store at about 11 p.m. on Oct. 12 , and the second was at the Brookdale Drive location that happened Saturday at about 9:30 p.m. A Charlotte and Concord Harris Teeter The Cabarrus County Sheriff's Office and the Concord Police Department are investigating the armed robberies.