The siege of Sarajevo began on April 6, 1992.
"He should have done something when he could to stop the war in Bosnia. But then he said that Slobodan Milosevic was a 'nice guy'," said Florence Hartmann, who was a foreign correspondent for the French newspaper Le Mondes during the war.
Other journalists, including a writer from the British newspaper The Guardian, agreed with Hartmann's criticism.
Carl Bildt was Sweden's Prime Minister between 1991 and 1994, when the Balkan war broke out. Towards the end of the war, during the summer of 1995, Bildt was named EU's mediator for the war.
He later became the head of the international agency that was responsible for ensuring that the Dayton peace accord was followed.