By Olivia Le Poidevin GENEVA, June 15 (Reuters) - The United Nations' human rights chief on Monday welcomed the announcement of a peace deal between the United States and Iran, and urged for maximum restraint by all sides in the region. "I welcome the announcement that the United States and Iran have agreed on a peace deal that provides for an immediate and permanent ceasefire, the reopening of the Strait of Hormuz, and a framework for further negotiations," said human rights chief Volker Turk.