Targeted DDoS attacks against European service providers are causing issues for Diablo, World of Warcraft, StarCraft and Hearthstone players in the region, Blizzard confirmed on the European support blog.
"Diablo, World of Warcraft, StarCraft and Hearthstone players may be impacted by high latency and disconnections during their gaming experience that are the result of a series of DDoS attacks on certain European online services," the statement reads. "Although Blizzard's infrastructure isn't targeted, the disruption effects rippled and have been felt by a portion of our players' population."
Blizzard noted yesterday that it began investigating the issue with its authentication servers where players were experiencing failed or slow login attempts over the weekend. The company maintains that it is monitoring the situation and advises users to follow the official European customer support Twitter account for service updates.