In August 1993, Peres was on an official visit in Stockholm. He asked Norwegian Foreign Minister Johan Holst to join him in Stockholm and help overcome the remaining obstacles via telephone with Yassir Arafat in Tunis. During seven hours of negotiations, the last issues of dispute were indeed resolved and a Declaration of Principles between Israel and the PLO was finally concluded on August 18,1993. Negotiations on a mutual recognition between Israel and the PLO continued in Paris, and via an intensive Norwegian shuttle between Tunis and Jerusalem. The letters confirming a mutual recognition were signing and exchanged between Arafat and Rabin on September 9,1993.