"Officers from the Metropolitan Police extradition unit have this morning arrested Julian Assange on behalf of the Swedish authorities on suspicion of rape," the police said in a statement.
"Today's actions against our editor-in-chief Julian Assange won't affect our operations: we will release more cables tonight as normal," Wikileaks said on its Twitter account.
Assange was attending a scheduled meeting with police, following their announcement yesterday that 'all the paperwork' necessary to issue an arrest warrant had been received.