A cybersecurity incident forced the New York Blood Center to call off 13 drives this week on Long Island.

Officials say their IT systems were impacted by a ransomware attack on Sunday.

They say they acted quickly to contain the threat and contacted law enforcement.

The blood supplier is working with experts to restore its systems as soon as possible.

This incident comes amid a blood emergency declared after a 30% drop in donations during recent weeks.

Officials say donor centers remain open.