The U.S. government says that Russia has targeted the U.S. power grid, supposedly as a protocol for its new sanctions.

The Department of Homeland Secured released details about this on Thursday, March 15, 2018.

As reported by CNN, The Trump administration announced extensive sanctions against Russia on Thursday morning, which included sanctions on the Internet Research Agency, a Russian troll farm that produced divisive political posts on American social media platforms during the 2016 presidential election.

According to the DHS, Russia accessed US government networks by initially targeting with malware small commercial third-party networks that were less secure.

Russia has attempted to attack targets that include “energy, nuclear, commercial facilities, water, aviation, and critical manufacturing sectors” since March 2016, DHS said.