The Lehigh Valley Health Network (LVHN) reported that a ransomware attack resulted in patient information and photos being posted online.

“This stolen information includes three screenshots, which are clinically appropriate photographs of cancer patients receiving radiation oncology treatment at LVPG Delta Medix, as well as seven documents containing patient information,” LVHN said in a statement issued Tuesday.

LVHN said BlackCat, a ransomware group associated with Russia, attacked its system in February.

“This unconscionable criminal act takes advantage of patients receiving cancer treatment, and LVHN condemns this despicable behavior,” according to the statement.

The network previously shared that it detected unauthorized activity within its information technology system on Feb. 6. It immediately launched an investigation, and notified law enforcement.

The attack has not disrupted LVHN’s operations.

“At this time, we continue our investigation and are in the process of identifying information involved in the incident. Based on our analysis to date, the attack was focused on the Delta Medix IT system and has had very limited impact on other LVHN IT systems,” according to the statement.

LVHN said it will provide notices to those whose information was involved.