The DOJ subpoena requests that Twitter turn over information on several supporters of WikiLeaks including the Icelandic MP:

Birgitta Jónsdóttir, an MP for the Movement in Iceland, revealed last week that the US justice department had asked Twitter to hand over her information. The US authorities are trying to build a criminal case against the website after its huge leaks of classified US information.

"[It is] very serious that a foreign state, the United States, demands such personal information of an Icelandic person, an elected official," the interior minister, Ogmundur Jonasson, told Icelandic broadcaster RUV. "This is even more serious when put [in] perspective and concerns freedom of speech and people's freedom in general," he added.

Iceland's foreign minister has demanded a meeting with U.S. Ambassador Luis Arreaga. So far there has no been official response from the U.S. State Department.

The Interior Minister has called the U.S. probe "serious and peculiar."

Click here to see Neon Tommy's full coverage of the DOJ subpoena including a link to the document.