Via The Swedish Wire: Martin McGuinness, a former Irish Republican Army commander and Sinn Fein political leader, has died in Derry following a short illness. He was 66. McGuinness helped negotiate peace in Northern Ireland after decades of sectarian violence, and became a senior official in its power-sharing government. Sweden’s former Prime Minister Carl Bildt said in a message on Twitter that McGuinness was “truly remarkable” for turning from terror to peacemaker. “The life of Martin McGuinness was truly remarkable. From rebellion and terror to truce and reconciliation”, Bildt said. Sinn Fein said on its website on Tuesday that McGuinness had died during the night. He was reportedly suffering from a rare condition caused by the abnormal buildup of protein deposits in tissues and organs. He resigned from the Belfast government in January. Sinn Fein said it is "with deep regret and sadness that we have learnt of the death of our friend and comrade Martin McGuinness who passed away in Derry during the night. He will be sorely missed by all who knew him", the Belfast Telegraph reports. Sinn Féin President Gerry Adams said: “Throughout his life Martin showed great determination, dignity and humility and it was no different during his short illness.