A series of sustained distributed denial-of-service (DDoS) attacks across a number of games including including MMOs RuneScape and Eve Online have caused widespread server disruption for players.

RuneScape developer Jagex posted on the game’s forum warning users not to participate in “dangerous/high-risk content such as PvP or high level PvM”, noting server disruption across both its game and web services.

A recent Jagex statement read: "As you may be aware, we're currently experiencing service disruption across both game and web services, this is affecting both RuneScape and Old School RuneScape.

"We are aware that RuneScape (as well as other games) are being targeted by attacks which are causing connectivity issues for our players.

"We are doing everything we can to mitigate any impact on your gameplay experience - our Systems Team are currently working to improve stability across our core hosting platform to improve the situation."

Eve Online developer CCP has also tweeted that its Tranquility server has been under a number of DDoS attacks, though connectivity has now been restored for the timebeing.

It has also been suggested that games including League of Legends and Guild Wars 2 have been affected.

Develop has reached out to the developers affected for comment on the matter.

It is not clear if there was any reason for the start of the attacks, though they appear to stem from a single group of hackers.