More than a week after Hannaford supermarkets were impacted by a cybersecurity incident, many of the grocer's online services remain down.

Ahold Delhaize USA said it recently detected a cybersecurity issue within its US network. "Immediately upon detecting the issue, our security teams began an investigation with the assistance of external cybersecurity experts," the company said.

Efforts to investigate the cybersecurity “issue” prompted the grocery giant's parent company to disconnect some systems to protect them.

Connecticut’s largest supermarket chain, Stop & Shop, reported cybersecurity issues on Friday but has been tight-lipped about what transpired. A lot is still unknown about the extent of the computer system hack,

The chain's grocery stores are short on certain products as the parent company deals with an undisclosed cybersecurity incident.