Oconee-based Community First Bank says 5% of its debit cards were compromised during routine merchant transactions in June and July. Federal, state and local enforcement authorities are investigating. And, according to a statement from the bank, the investigation is delving into possible criminal activity related to other unauthorized transactions involving debit card activity in the area. Fred Shepherd, Community First President/CEO, stressed that none of the bank’s systems were compromised. The bank says it moved quickly to respond to customers reporting unauthorized charges and withdrawals. The old debit card is immediately canceled. The time in re-issuing new cards can be several business days. The bank is preparing to mail letters expressing regret what’s happened and the imposition that it has caused customers.