North Korea may have been launching cyberattacks against South Korean virtual currency exchanges in the face of heavier economic sanctions, according to a Radio Free Asia (RFA) report.

The CWIC Cyber Warfare Research Center in South Korea says a domestic exchange for bitcoin, the worldwide cryptocurrency and digital payment system, has been the target of an attempted hacking, according to the RFA story that was picked up by UPI and other news outlets.

Other targets include South Korean financial technology companies and smaller businesses that use online financial tools, according to the report by the US-funded media organization.