Anonymous has claimed responsibility for a large-scale cyberattack on Turkish servers carried out as part of a campaign against the Turkish government over its support of Daesh.

The hacktivist group temporarily brought down as many as 40,000 websites, with the majority of them now back online.

Earlier the hacktivist group released a video with a message for Turkey:

“Dear government of Turkey, if you don’t stop supporting ISIS, we will continue attacking your internet, your ROOT DNS, your banks and take your government sites down,” Anonymous said. “After the ROOT DNS we will start to hit your airports, military assets and private state connections. We will destroy your critical banking infrastructure.”

Turkey’s shady dealings with Daesh came under a spotlight in recent weeks after the Russian Defense Ministry released satellite images showing the terrorist group transporting up to 200,000 barrels of oil in at least 1,722 trucks to third-party countries, most notably Turkey.

Russia has also accused Erdogan and his family of direct involvement in the terrorist group’s oil business.

The West has also repeatedly urged Ankara to seal the porous border with Syria to prevent terrorists from entering or leaving the country.