Pro-Russian hackers are continuing to hit targets in Ukraine amid a counteroffensive aimed at reclaiming territory held by Russian forces in what Ukrainian officials and researchers describe as an intense period of network operations as the conflict heats up.

“The activity is still very high,” said Victor Zhora, a top Ukrainian cybersecurity official told CyberScoop via online chat Thursday.

Zhora, the deputy chairman of the State Service of Special Communications and Information Protection of Ukraine, which is responsible for the defense of Ukrainian government systems, said that pro-Russian hackers are focused on Ukrainian service providers, media and critical infrastructure, as well as collecting data from government networks. Zhora said his team is expecting the pace of pro-Russian operations to pick up.